I have 4 wheelsets from DCR on various bikes and highly rate them, including a 30mm internal MTB set (but not the 35’s) and others for road / gravel. I’ve never needed anything more than an occasional bearing replacement.
I believe the rims come from a factory that produce stuff for many other big brands, and Bitex hubs are excellent, just as durable / reliable as the major players but often lighter and cheaper.
DCR are a small company that exist because they really care about wheels. They don’t go big on marketing but have many loyal/returning customers and are nice people making good things.