Two lads I know both bought Hecklers same shop same day at same time. Shimano motors went on both within 30 minutes of each other and under 6 months old. Other lad Simon has had Bosch on a Trek hardtail for 6 years now never been cleaned zero maintenance forks all rusted. Put it in shop last year they changed brakes and drive train It has never once missed a beat . Is it lucky white Heather .Reliable? 4 motors, I'm glad mine is a Shimano!