My bike has a Nexus 7. It's been good enough so far, but hasn't been through a WI winter yet. And when it *does* go through a winter, it'll have indoor storage. It's a bit less smooth than a SRAM 7 and an old style Sturmey Archer AW, and I'd prefer either one if I'd had a choice about what hub went in my rear wheel.
Since I didn't have much of a choice, if I ever wear the hub out, I'll rebuild the wheel with SRAM.