The Delta Universal Mobile Base works as well as I expected, and in the long run it should be a very worthwhile investment.  At 22' x 24', my basement shop is spacious compared to the spaces I used to have to work in, but it is still not large enough to have dedicated space for all machines.  Only my table saw, drill press, and bandsaw get that.  This base was purchased for my 6" Delta jointer, which is pretty heavy to slide across the floor otherwise.  The base allows me to position the jointer exactly where I have the open space and where I can reach it with my dust collector.  Really, the the only complaint I have is that of the 18 carriage bolts it came with, 10 of them were 1/16" too short, which wouldn't allow the nuts to even start threading on.  So I went to the hardware store to buy REAL 2" long carriage bolts, only to find out that they were 1/16" short too.  Fortunately, I found this out while in the store, so I bought the next size longer, which was 2-1/2".  Now they stick out too far and need to be trimmed.  If the base would have just come with 2-1/4" long carriage bolts (if they exist) in the first place, I could have saved a trip to the store.  This was a minor annoyance, but Delta really should just fix the problem.  I would buy more of these if I needed them, but everything else is either going to stay fixed or already has wheels.