That's great to hear and a BIG plus for ebiking...hope they all become quieter and quieter, that will be the secret to acceptance in a lot of places...pulling max level on a steep incline with the motor making full torque is probably going to make some noise though...even on the Brose, but with that said, I did forget the Levo is IP 67 rated and that could be helping a lot toward noise suppression...where the Bulls are only IP 56 rated, so that could be the difference right there...of course the price is a big difference as well...