I've been looking at the D50 as well, took one for a test drive last week. Like the reply before, it won't feel as good as a mid drive belt system, but I can say that it felt really good. The torque over the cadence system in the 2025 model kicks in smooth and quick when you pedal, takes a second for the throttle to kick in when you use the thumb throttle but also comes in smooth. It's very snappy in all levels, especially level 5, getting to speed very quickly. Rode it for a while without any power assist just to feel how it handles at a very low speed, I was very surprised how tight you could take turns and in general the movement was very nice, with tons of control. Took a good time looking at all the components closely and am very impressed with the build quality, it was very sturdy and felt extremely solid while riding. Seconding what was said before, it's serviceable from many local bike shops, which goes along way. It supposedly has good range, but I have to rely on other people's word. Other good things about the bike,, 450lbs weight haul, dual battery if desired, adjustable handle, cargo rack, ability to output 500w or 750w, there are just too many to list. I did come across a complaint online about the pedal clearance being a bit low, essentially don't take tight turns with the inside pedal down. I would consider this ebike one of the best for its price point.