I've got an SSD in my dev machine. It's an earlier intel drive and I'm using WinXP. It has really fast read performance, making otherwise slow svn operations on my working copy effectively instant. The write performance is atrocious. When doing any significant writing, it tends to hang my whole system for 30 seconds out of every 90. I can't even move the mouse when it happens. Compiling does it, so I tend to do builds on a normal HDD. I suspect if I had trim support and plenty of empty space it wouldn't be a big deal.