I've got an e13 crankset but have had terrible luck with the bottom brackets. Even after chasing/facing the frame on the last one, they creak and crack all the time. This happened with the original one too - it was really loud for the first few months then eventually settled in and ran perfectly for about another year. My theory is that it takes a while for the cups to get a good fit, but its a bit unsettling on the trail

I really like the crank so I'm thinking of trying one of the enduro replacement BB's (EXTERNAL CUP BB30 BOTTOM BRACKETS FROM REAL WORLD CYCLING). Does anyone have any trail time on these? If so does it feel significantly more solid (and is it any less noisy) than the e 13 bottom brackets?