I bought the nickel finish, and it looks fine with the chrome hardware on my Epi Les Paul 2013 Honeyburst Plus Top Pro.

But here's the rub: The button screw on the Epi is larger in diameter than the Schaller screw, so the hole on the guitar is bigger than it should be for the Schaller screw. Ok, if you tried to screw the Schaller screw into the Epi hole, it may seem to fit, but by definition it won't be good fit.

I didn't want to fill the guitar holes with toothpicks and glue, re-drill and so forth, as it involves doing stuff to the guitar. I wanted to use the Epi screw. So I had to drill the hole in the Schaller button so that it's big enough to accommodate the Epi screw (doesn't take much drilling, very pleasant to do, in fact). Second, I used a Dremel rotary tool to file the heads of the Epi screws so that they\re small enough to go into the Schaller button.

After you do all that, the Schaller buttons screw on with the Epi screws, and everything's copacetic.

I wish Schaller would design the lock so that the hole is bigger and provide two sets of screws of varying diameters to accommodate different guitars. So I cannot give 5 stars because of all the work needed to make it really secure on my Epi Les Paul.

One final problem: My guitar strap is pretty thick (two layers of leather) at the button points, and it took a lot of trimming to dress the strap holes so that there's enough space to slip on both the washer and nut and then tighten the nut (with a wrench above and another below). After the nut started to turn, I could then use a lot of torque to tighten and squish the leather. I think Schaller should have made the  threads longer to accommodate thicker straps. Note that the wrench can scratch the shiny washer, so if it's important to you, put tape on the wrench head first).

Finally, I keep my Epi in a Gibson Les Paul case (I figure I'll one day buy a Gibson, so I might as well get a Gibson case). The case has lots of clearance for the two buttons (with the strap removed), so no worries there.
I bought the nickel finish, and it looks fine with the chrome hardware on my Epi Les Paul 2013 Honeyburst Plus Top Pro. But here's the rub: The button screw on the Epi is larger in diameter than the Schaller screw, so the hole on the guitar is bigger than it should be for the Schaller screw. Ok, if you tried to screw the Schaller screw into the Epi hole, it may seem to fit, but by definition it won't be good fit. I didn't want to fill the guitar holes with toothpicks and glue, re-drill and so forth, as it involves doing stuff to the guitar. I wanted to use the Epi screw. So I had to drill the hole in the Schaller button so that it's big enough to accommodate the Epi screw (doesn't take much drilling, very pleasant to do, in fact). Second, I used a Dremel rotary tool to file the heads of the Epi screws so that they\re small enough to go into the Schaller button. After you do all that, the Schaller buttons screw on with the Epi screws, and everything's copacetic. I wish Schaller would design the lock so that the hole is bigger and provide two sets of screws of varying diameters to accommodate different guitars. So I cannot give 5 stars because of all the work needed to make it really secure on my Epi Les Paul. One final problem: My guitar strap is pretty thick (two layers of leather) at the button points, and it took a lot of trimming to dress the strap holes so that there's enough space to slip on both the washer and nut and then tighten the nut (with a wrench above and another below). After the nut started to turn, I could then use a lot of torque to tighten and squish the leather. I think Schaller should have made the  threads longer to accommodate thicker straps. Note that the wrench can scratch the shiny washer, so if it's important to you, put tape on the wrench head first). Finally, I keep my Epi in a Gibson Les Paul case (I figure I'll one day buy a Gibson, so I might as well get a Gibson case). The case has lots of clearance for the two buttons (with the strap removed), so no worries there.