I have a pair of the 700c complete wheelsets and I probably put them through more rough stuff than they were intended to be on.
I've ridden them for about 500-600 miles, about 40% gravel (nothing super rough) and 60% road in the Oakland/Berkeley Hills. I ride my bikes kind of hard, with a lot of out of the saddle, high torque efforts. I'm never riding any trails that I'd be more comfortable on a front suspension bike on. The wheels were machine built, so they went out of true rather quickly which was expected. At ~200 miles, I gave them a little touch true to keep them laterally true. But shortly after (~70 miles later), they went out of true again, and I attributed this to my lack of experience truing wheels, it being machine-built wheel, how light the rim is, and/or how hard i'm pushing them.
An acquaintance mentioned that he had to true his wheelset about 5 times before they stayed true. I'm not super well equipped to true wheels appropriately, so this would have gotten expensive for me to get a shop to do this regularly, so I just got them detensioned/retensioned by a trusted wheel builder. The wheel builder mentioned that the rear hub is a bit crunchy already and he suggested I replace the bearings and clean out the internals to get 'em smooth again. I wasn't thrilled to hear that, but it's all good.
Anyways, the wheels are light and really responsive, I like how quickly they spin up, and they're priced really well. But since I'm not a wheelbuilder-type, I think this is the last machine-built wheelset I ever buy. The wheels were pretty, light, and cheap-ish. But as a friend says, strong, light, cheap; you can only pick two.