I installed the T-Rex Sliders Saturday on my '05. It was somewhat challenging for me. I don't really enjoy the wrench work, and on the '05, you've got to take off the fairing sides to get it done. It wasn't terribly technical, but it did take me a bit of time with some additional work "under the hood" (heat fix, etc.)
I'm a little concerned about these things, though. They don't appear to be sticking out far enough to really protect much of anything in a crash - they're only out about an inch outside of the fairing. When 'using' them, is it still likely to lose much of the plastic work on the bike? They're not obtrusive enough to ruin the aesthetics of the bike, but neither are they long enough to appear to protect much.