I have the 155" and so far the only con I have is the enormous rooster tail it throws. I went to a longer flap to control it. It, so far, has great traction on the trail and in the sugary crap we're calling snow in IP.
I installed a 163 track and spent two days breaking trail in some deeeep powder. It floats excellent. the only bad thing is that it does shoot out a rooster tail, but i'm not back there
I have a dragon and have been riding with Pros, the only drawback is that the dragon with/without this track is heavy in comparison.