Are we talking ones that come as part of a frame or ones that you add to pf30 and bb30 frames.
Ones that come as frame, had a singlespeed cannondale, nice bike but the bottom bracket wasn’t that God to adjust, and required regular adjustment.
In the pf30 had a problem solvers, which was ok, but the bearings have now seized and finding replacement is a nightmare and it runs silly plastic inserts in the bearings. Now using a wheels manufacturing one, bearings seem good, starting tight seems better in the frame, but it’s a lot snugger in the frame than the problem solvers.