My brother has been using Bootcamp on his MacBook without any hitch for game playing. I have to say it was simpler to install windows on the Mac than any PC I've done since the program prompts you to burn a disc with all needed software and up to date drivers. The only downside is there is no support for right-clicking without a mouse or third-party hacks.
Parallels is a better solution IMHO if you don't need to do any work involving the video card as hardware acceleration seems to be non-existant.
Ars has a review.