I love Lib/Gnu boards. Don't own any at the moment, but I've had maybe a dozen over the years, including the earliest MTX and BTX boards. Mervin was def a huge innovator when they brought in and popularized new edge tech and reverse camber. Magnetraction is awesome, and is far superior to Vario Grip in ice. There's just no argument to be had, other than people saying it grips/turns too much. I never had that issue, it's just a matter of edge control. I haven't tried the mellower MTX on boards like the Phoenix series (Lynn/Lando) and Smokin boards, but I'd imagine it's even better. and would shut up those complaints. Unfortunately I have yet to ride a Mervin board w/C2 though, but I have owned 3 NS boards with RC, which I absolutely love.
Once again, the Lib/Gnu boards hold up just fine. All of mine, and friends have been fine. The only real "issue" (which doesn't even really matter to me) is that the edges of the topsheet gets nicked up easily, but it's mainly cosmetic, and if it looks bad just a little epoxy will ease any worries.
16 Gnu Swallow Tail Carver . 16 NS West . 15 NS Snowtrooper BIA
16 Burton Genesis X . 15 Now Drive
16 Flow Talon . 14 Flow Hylite