I just bought a UDM, used it on my daily driver, works great. Then my project car has been wetsanded, worked on it w/ the UDM and discovered that it would take a long time to get right so I bought a Makita rotary. Just tried that this weekend and man its a hole different ballgame, cuts like a dream. I dont plan on using them much at all, but may help a few friends out ect...Also I like cars as a hobby and know many others also and may help them for a little $$
Was it worth it, ??maybe not after all the $$$ for products/pads ect.., but I'm the type of person that likes to learn to do things myself, rebuilt my car from the ground up, highly modified, by myself w/ little help from others.
Put it this way, heres an example: I was going to pay to have someone rebuild my auto trans in my project car, thought about it hard and long. I figure that it will be the 1st thing to fail even professionally built because it was only made to support 180ft/lbs and I'm going to push 3 times that through it w/ slicks. I decied to research it and do it myself. This way if it fails then I will not be n the same situation again, I will be able to fix it myself. So far it works great have no probs w/ it, haven't turned it up all the way yet(its on low boost till next year).
Same w/ a PC, UDM, if you pay someone to detail your car how much is that going to cost??, then figure if later you have a few scratches and pay again. The way I figure it you may as well give it a shot. Its your money in the end.