Let's offroad / mountain bike / mtb / ride dirt

Set screw EBBs, as found on the Charge are generally fine if kept greased once in a while. The main issue with them is people over-tightening the screws/bolts and distorting the BB shell.

The only other problem I'm aware of is when they are adjusted too often. This can cause tracking on the EBB from indentations from where the screws/bolts are really close together, which could cause it to slip.

This, last bike had an EBB, no real problems aside from when it wasn't greased enough. If I had a choice now i'd probably go for sliding dropouts. My current frame has slot dropouts which is fine except it doesn't seem to have been designed with mechanical brakes in mind. So I can't use the full length of the dropouts as the caliper hits the seat stay.