There have been a lot of these lately, but this one is a little different. I hope. I was browsing MacUpdate in anticipation of my Mini and discovered there's several different themers available for OS X: Duality ShapeShifter Theme Changer Themer 3G ShapeShifter is the most popular of these, and the one I usually hear mentioned, but there's a disconcerting amount of dire warnings in the "User Reviews" section; tales of system slowdown, frequent crashes, and having to reinstall OS X to get rid of it. Also, it's the only one that costs money. For this reason, I'd like to give the others some consideration before making a choice. But there's hardly any information on them on MacUpdate. So can I solicit reports of your experiences from any forum members who have tried one or more of these programs? One thing that doesn't matter too much to me is the selection of themes available. If I can't find one I like, I'll roll my own.