Though I'm a big fan of RAD, and there are a lot of very happy RAD City owners, I would caution that this bike uses a direct drive rear hub motor that offers significantly less power than a geared rear hub with the same watt rating. This lack of power very noticeable with medium to large riders while accelerating from a stop, and while attempting to climb just moderately steep hills. Geared hub motors can run circles around them, and offer much sportier performance. Noteworthy as well, is the fact the RAD City is one of the only bikes left on the market still using a direct drive rear hub. You have to wonder why that might be. Do NOT believe the relevance regarding the fact they are quieter, or they have less moving parts. They are NOT any quieter than competitive bikes, and the number of moving parts is a moot point as the geared hub motors seem to go forever without service.
The number of "known problems" shown here on EBR has no significance other than to represent the number of bikes sold.
In no particular order, Juiced, Rize, Biketrix, M2U, Ride One Up, Espin, and Aventon are all worth checking out, among others. Note these bikes are all using similar quality parts, are all built in China, and there are very few proprietary parts used to build them. That means a long service life - even if the original bike manf. folds - as the parts to service them are available anywhere parts are sold.