Carbon wheels used to be expensive. You could get them cheap, but had to build them up yourself with direct from china rims that often were sub par build quality and once they cracked, you were SOL unless you bought a new rim. Not anymore. Santa Cruz has reduced the price of reputable name brand carbon wheels by an astonishing amount, while not letting quality suffer.
Lets not split hairs here, these rims are still made in Asia, but they are made in a facility where quality is highly monitored and controlled. The rim is a ground up design by carbon engineers at Santa Cruz, and they found a facility overseas where the manufacturing is up to SC's quite rigorous standards. The result of this is a wheelset that can perform at the same level as wheelsets that cost twice as much, while retaining a lifetime warranty policy, even if they break while riding.
They ride extremely well, as you would expect. You definitely get a bit more trail feedback than from a comparable alloy wheelset, but the tracking and steering precision are noticeable. Lateral rigidity is great, I never noticed them moving around on me when changing lines mid corner. DT 350 hubs are the bomber option, and SC includes the 36 tooth ratchet with these, so while engagement isn't stellar, it is a drive system that very rarely, if ever, breaks.
In short, you should buy these wheels. Your bike will be better, you will be faster, and you'll have the confidence of the lifetime warranty to back up blind hucks into rock gardens.