After riding a GNU Altered Genetics (MTX) last year and a Skate Banana (BTX) this year, I can tell you I'm not likely to ever go back to a standard board. Only bad thing I can see is if you're not big enough for a 167. I'm 6'1 215lbs and I the GNU is a 162 and the SB is a 159
The magnetraction is def overrated, don't know anything about they're banana shape because I've never ridden one. But if you want to buy that board in 167 make sure you're 6'8" 260lbs because that thing is a beast.
Do it, sick board... also i'm pretty sure Lib and GNU made the edges wrap around the whole board now... I was looking at a guys BTX Jamie Lynn at Stratton a couple of weeks ago and his board definitely had fully wrapped edges... any owners of the 08/09 boards wanna chime in???