Reviews are pretty misleading. Most reviews are posted by people that are disgruntled to a certain degree. Many hide the underlying cause for the negative interaction. At least that is my opinion. As for Aventon’s quality I have been impressed. The motors they use are Bafang which is as mainstream as you can get. Brakes are Tektro, rear gearing is Shimano; again mainstream component companies. The display, battery and controller are proprietary. The display/controller is not programmable, and the battery is Aventon specific. I know plenty of people complain about this, But it’s understandable. They are rapidly becoming a top seller of e-bikes and they don’t want people messing around with their electronics. I believe they do it to ensure that customers don’t modify them thus causing increased warranty issues. This also keeps their costs down allowing them to be very competitive. When it comes to step-through type frames I feel it is one of the best out there: frame flex is very minimal and that is a huge accomplishment for a frame with a single down tube. My wife has to use a step-through and the other e-bikes I have tested for her had so much frame flex. There is no way they would have handled a bag of groceries in an up-front basket and still have been safe to ride at even class 2 speeds. She loves the Aventon Aventure ebike. The fat tires also help her navigate softer terrain and has improved her confidence on a bike. We just rode some rough shell fishing trails in the Canaveral Seashore area of the intercoastal river and it beat me up, but she was just all smiles as she rode her fat tire bike watching dolphins, fish jumping, and all kinds of birds flying about. For me I only use full frames because I push them to their limits. Believe it or not I’m perfectly happy with one of the least expensive ebikes out there; Wallke F1 and F2 bikes. I have heavily modified the F1 to the point that it weighs 100 pounds with 3 batteries, racks and panniers. And it still handles great. But I still wouldn’t let go of the bars while descending a bridge at 35mph. Even the stock display can be unlocked and used to reprogram the controller settings. For $900 e-bikes they seem to be an incredible deal to me.