Personally, I think these things are just brilliant!  I've used Schaller's in the past and in general, love Schaller gear (particularly their tuners and bass bridges), however in this case I do actually prefer the Dunlaps.  The main reasons are 1.) Ease of use and 2.) More compatible with regular straps.

Since I've seen a couple of comments regarding this, I'd like to take a second here and talk about the installation.  First and foremost, please be aware that you should probably use a degree of common sense when installing these!  The screws for the strap pegs are a bit larger than most average size (guitar peg) screws...I suspect this is intentional on the part of Dunlap so as to more securely hold the instrument.  As such, you may very well need to drill out your existing peg holes just a bit, otherwise you may find yourself really torquing down on the screw driver.  This shouldn't be a big deal, however some folks do seem to over-look it.  Likewise, as someone else mentioned, if you are using these on something with a less than traditional design, such as an Ovation with a fiber/carbon/composite bowl, you may need to improvise just a bit....I would not expect these fairly traditional wood screws to work easily with an aluminum or acrylic body either without some degree of modification.

Likewise, as some folks have already mentioned, the locks themselves...the part that goes on your strap ends...does tend to have a rather snug fit, particularly with thicker straps.  With one of my nice leather straps, yea...it took some "patience" to get that clip on there.  That said, at this point I have installed 5 or 6 sets of these and I have NOT had to "beat the sh_t out of it" as one reviewer suggested.  Again I would suggest a degree of common sense here...these are designed for a fairly average strap thickness, so if your strap ends are exceptionally thick (such as a heavy leather), you may very well need to fudge with it just a bit or simply use them with a different strap.

In short, guitars aren't really "one size fits all", so there's no reason to assume that something such as a strap locking system should be.  Again please use some common sense and adjust to your own situation accordingly and if you're not competent or comfortable using basic hand tools, please refer the installation to a set up pro!

Now to get back to my initial comment up there, I do actually prefer these over the Schallers.  I've used the Schallers in the past and wouldn't hesitate to use them again, however I found the Dunlaps much easier to use...button on, button off...they really are THAT simple to use (as apposed to having to pull and fudge with that little knob on the Schallers).  I also like that the Dunlaps use a much more traditional strap peg design as compared to the Schallers.  I'll admit it...I can be a forgetful ol' fart sometimes and there have been one or two occasions where I forgot to toss my strap in my case before heading out the door.  While the Schaller's have a MUCH more rounded design, allowing a regular strap to slip off MUCH easier, with the Dunlaps I can simply borrow a strap from someone and I'm still good to go for the night...unlike the Schallers, the Dunlap strap pegs hold the strap as securely as a traditional strap peg would.  I also find that the larger washer and mount of the Dunlaps tend to hold the strap ends MUCH more secure than the Schaller's do with the smaller nut and washer design (when I still used the Schallers, I always replaced those stock washers with larger fender washers so as to get a better bite on the strap end).

If I really have any little niggle about these at all, it's simply that you can't purchase the strap pegs separately.  As a person who has around a dozen or so guitars that I use regularly (with more than 30 in the collection as of this writing),  I really only have 3 or 4 straps that I typically use.  It would be nice if I could use those straps on ANY of the guitars withOUT having to buy the full strap lock set.

Regardless of which brand you choose, as a person who has indeed dropped a guitar or two on his foot over the years, I feel that strap locks are nearly as essential as a good guitar tuner...I really can't see going on stage without them!  Definitely a worthwhile investment!
Personally, I think these things are just brilliant! I've used Schaller's in the past and in general, love Schaller gear (particularly their tuners and bass bridges), however in this case I do actually prefer the Dunlaps. The main reasons are 1. ) Ease of use and 2. ) More compatible with regular straps. Since I've seen a couple of comments regarding this, I'd like to take a second here and talk about the installation. First and foremost, please be aware that you should probably use a degree of common sense when installing these! The screws for the strap pegs are a bit larger than most average size (guitar peg) screws... I suspect this is intentional on the part of Dunlap so as to more securely hold the instrument. As such, you may very well need to drill out your existing peg holes just a bit, otherwise you may find yourself really torquing down on the screw driver. This shouldn't be a big deal, however some folks do seem to over-look it. Likewise, as someone else mentioned, if you are using these on something with a less than traditional design, such as an Ovation with a fiber/carbon/composite bowl, you may need to improvise just a bit.... I would not expect these fairly traditional wood screws to work easily with an aluminum or acrylic body either without some degree of modification. Likewise, as some folks have already mentioned, the locks themselves... the part that goes on your strap ends... does tend to have a rather snug fit, particularly with thicker straps. With one of my nice leather straps, yea... it took some "patience" to get that clip on there. That said, at this point I have installed 5 or 6 sets of these and I have NOT had to "beat the sh_t out of it" as one reviewer suggested. Again I would suggest a degree of common sense here... these are designed for a fairly average strap thickness, so if your strap ends are exceptionally thick (such as a heavy leather), you may very well need to fudge with it just a bit or simply use them with a different strap. In short, guitars aren't really "one size fits all", so there's no reason to assume that something such as a strap locking system should be. Again please use some common sense and adjust to your own situation accordingly and if you're not competent or comfortable using basic hand tools, please refer the installation to a set up pro! Now to get back to my initial comment up there, I do actually prefer these over the Schallers. I've used the Schallers in the past and wouldn't hesitate to use them again, however I found the Dunlaps much easier to use... button on, button off... they really are THAT simple to use (as apposed to having to pull and fudge with that little knob on the Schallers). I also like that the Dunlaps use a much more traditional strap peg design as compared to the Schallers. I'll admit it... I can be a forgetful ol' fart sometimes and there have been one or two occasions where I forgot to toss my strap in my case before heading out the door. While the Schaller's have a MUCH more rounded design, allowing a regular strap to slip off MUCH easier, with the Dunlaps I can simply borrow a strap from someone and I'm still good to go for the night... unlike the Schallers, the Dunlap strap pegs hold the strap as securely as a traditional strap peg would. I also find that the larger washer and mount of the Dunlaps tend to hold the strap ends MUCH more secure than the Schaller's do with the smaller nut and washer design (when I still used the Schallers, I always replaced those stock washers with larger fender washers so as to get a better bite on the strap end). If I really have any little niggle about these at all, it's simply that you can't purchase the strap pegs separately. As a person who has around a dozen or so guitars that I use regularly (with more than 30 in the collection as of this writing),  I really only have 3 or 4 straps that I typically use. It would be nice if I could use those straps on ANY of the guitars withOUT having to buy the full strap lock set. Regardless of which brand you choose, as a person who has indeed dropped a guitar or two on his foot over the years, I feel that strap locks are nearly as essential as a good guitar tuner... I really can't see going on stage without them! Definitely a worthwhile investment!