My experience using Windows 7 under bootcamp has been somewhat disappointing.
I first installed it on a Mini, which seems to run pretty well for the most part. Can't seem to get the firewire port to work though.
On my 15" 2011 MacBook Pro, it's really disappointing so far. As mentioned previously, the trackpad is really weird, the battery life sucks, and it gets so hot it's really uncomfortable to work on for long periods of time. The biggest problem though is that something is really screwy with the graphics drivers. I get refresh rate problems all the time dragging windows around the screen like I have a graphics card with 32mb of ram or something 🙁. Since I bought the computer with the thought that it could run windows programs no sweat, this is really a bummer and I think I would have made a different purchasing decision had I known how poorly the computer would run windows 7.
Oh and no delete key..which is much more annoying than I thought it would be🙂