General all round trail riding, mostly Peaks but also Lakes, the odd trail centre, Dh runs, Riviera Bike holiday etc.
I also have an Intense Uzzi which used to do dual duties as trail bike and "big" bike. I've ridden it once since getting the Rocket and hated it. The Rocket handles better, is over 5lb lighter, climbs leagues better and is all round more involving. it may be fractionally slower in a straight line over the rocks, but to be honest I don't really care. I also have to make a conscious effort to ride my hardtails, as it's just too easy to grab the Rocket, knowing it'll do most things pretty bloody well.
Weaknesses? Being long, low and slack it's not at it's best on real trialsy stuff, especially if there's not much gradient involved, and it definitely responds better to being thrashed than being bimbled on. Mine is 30lb and compared to my 22.5lb Soda it does take some winding up on flatter stuff, but then that's true of any 150mm travel bike, I guess.
I haven't really felt it get out of it's depth. It was a wee handful on some of the properly steep gullys on the Innerleithen DH runs, but that's as much the rider crapping out as anything. It dealt with the Matador drops without any problems and it jumps very nicely. Steep twisty gnadgery singletrack it's just absolutely ****' ace.
I've had mine 6 months now, and after 20 years of MTBing, it's as close as I've come to being the "one" bike for the kind of riding I like. Much as I dearly love my Soda, this just shreds better.