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gbj_tester
I've been using a Token square taper BB for a while now, model with hollow Cro-Mo axle and crabon shell.
Weighs 220g with a 113mm axle, which is substantially less than the ~300g+ of the Shimano equivalents if that matters to you. Bearings feel great still, and the cup design precludes binding them by over-tightening.
The seals seem flimsier than Shimano ones though, so I packed the inside of each cup seal with grease prior to installation to give the seal lips a chance to stay moist. This was harder on the drive-side as the seal doesn't want to pop out without damage, so I injected a load of grease under it via a syringe.