I have the 2010 model and it has been the 1 board in my quiver that I know I can count on for everything from crust to hardpack to fresh. When heading into unknown or variable conditions the C2 BTX with mag is the way to go. I'm 150 lbs, ride a 155 and I'd say the 6.5 stiffness rating is right on target.
Pros: Super stable Ride: Charge a line, pop on, over and off shit, hit kickers and drops, and generally go hard is what this board like to do. Magna really helps on crusty midwest days. Also helps on crusty Jackson Hole days, and crusty undies days. The C2 really helps the float in all sorts of conditions but maintains most of the camber stiffness for charging, ollies, and stability.
Cons: I've bought several new boards but I keep coming back to this one. I can't find a reason to retire it and that's the worst thing I can say about it. (Closest I've come to switching is the Yes 'Greats' board which is more lively)
Considerations: If you're looking for a butters/jibs only board there are softer more playful boards for that stuff. It's also not the most 'lively' board if you're not putting in effort, but its stability makes up for that for me.
Conclusion: The first day I rode my board I noticed a topsheet bubble, but in 2 seasons it's never got bigger or caused any issues. The base has held up amazingly; I've had to do some repairs but never had a core shot (I generally get a few). Could've sized down on this board and still been good. I've made the (GNU/LIB/ROXY) C2 BTX recommendation to several people looking for a 1 board quiver and they've all been very happy with its versatility.