I've been using 3 metric MIP/Thorp drivers for years, never had to send them back for reshaping (nice that MIP does a service for that, but that means they are not replaceable like Hudy/other drivers). I like the heft and handle shape of the MIP drivers. I've got some HB/generic drivers that I used as temporary replacements, but mainly now I use the 3mm one (because that's the only size I don't have in MIP wrenches), it's fine, it's like the other hollow alum. drivers out there. I have a couple of 3Racing drivers but their thin drivers have a tendency to break, so I have a broken one
and a couple of nut drivers.
I'll likely start slowly switching to the Profitools from Hudy, I like the feel of them and want a matching set after all this time
I just wish they offered a set
of drivers instead of buying them individually (also wished they had nut drivers), but they are reasonably priced. Their professional range can grind at your hands and fingertips if you're doing a lot of wrenching or building.