I installed dual-boot Win7 Ultimate and Backtrack 4 Final.
No general problems. Wireless works but injection failed. I do not know why. I used Alfa AWUS036H with no problems. Injection works with Alfa unit.
I love the larger keyboard, and the 15.1" screen. I rarely if ever use the CD/DVD drive. You must install VLC to play DVD's or listen to SomaFM. Audacity works.
Quick aside, I purchased a brand new battery. The computer has a longer battery life under Win7 than BackTrack. I do not know why this should be. I tried this over several weeks. I would think BackTrack is lighter OS, more efficient, etc. would get better mileage.
Except for the weight of the machine and general large size, you should have no problems with this machine.