Well, I am one who did it. I'm also the kind of person who likes to have the excuse to take things apart. ;) In my case, it was worth it because I found a hairline crack at the right rear stud in the case but that was pure luck. The piston/rings/cylinder looked just fine. Even my hairline probably wasn't that bad but I figured it was under warranty and I bought it new and I wanted it to be perfect. Would I do it again? Only if I knew I had a problem.
One thing I like about the 200 is that it can be overbored to 225cc and ported to take advantage the increased displacement. Do a search for Eric Gorr in the archives or www.eric-gorr.com. This is planned for when it's time to do a top end.
So far I've done the recommended maintenance to the rear suspension and linkage and set up the springs and valving to my weight and riding style along with the airbox lid and rejetting. Big difference and worth it. I've got my Scotts damper to put on still. Next year will be the RB-modded PWK Airstriker carb, Gnarly pipe, V-force2, and possibly the FMF TC II S/A.
Best tinkertoy for the $$ I've ever owned. ;)
Best,
Greg