i have BB7 roads and BB5s I ised for many years. The BB5s nearly killed me because I didn’t adjust them – they get a bit crap them suddenly stop working at all because only 1 pad moves, the other is fixed so the disc gets bent and there’s very littel pad contact beyond a certain point. When adjusted correctly, they’re good. If you need to use cables (STI levers) they’re great.
BUT I switched to Deores after the BB5s nearly killed me. And hydraulics self-adjust, have 2 moving pads, blah. Very good.
BUT at SSWC Aviemore, the morning after a discussion with Jeff Jones on why he uses BB7s on his wonder bikes (“you can’t lose all the fluid and be helpless if you have cables”) – I got on the bike and found I’d lost all the fluid in my rear brake due to a loose banjo! Cue DIY brake-bleed kit.
BUT that doesn’t really happen much and you can get good hydraulics for sweeties now:
CRC has LX for £50 an end, wrong levers but easy to swap
All in all I’m off the BB5s.
al.