After 1.5 years and 3000 miles, I’ve had absolutely no issues with the bike. No loose spokes, no bike part rattles and the motor is still whisper quiet. I love the Bosch power pack. It is so easy to attach, remove and carry. The power tube may make a bike look better, but the extra effort when attaching and removing the battery was something I didn’t want to bother with. When I bought the bike I ordered an extra battery. The extra battery fits easily into a standard back rack bag. When I get back from a long run, I can carry both batteries into the house with one hand. Try that with two power tube batteries. Ed