Although I am very early in the Bafang experience, thus far I have not been disappointed by the products (or prices) received from elife bike (the 750 w motor) and aliexpress (the 48v battery). Although I was dealing directly with Chinese vendors, both were very helpful and respectful throughout the process and all items arrived as advertised and in a timely manner. However, I would like to give a HUGE shout out to Doug at California e-bikes
, for his youtube videos and personal correspondence regarding installing the Bafang on my bike - his information and encouragement were priceless and he directed me to endless sphere and it's incomparable wealth of e-bike information.
Cheers for now,
PS: since this initial post my controller went out, after less than 5 miles of round the neighborhood testing. When I contacted elifebike they told me to ship it back to them at my expense ($25), they would send back to Bafang factory for repair and I would pay for shipping back to me ($25). When I purchased the BBS02, they advertised it having an improved controller.
I have ordered a replacement from Lectric Cycles, based on the favorable reviews I have read on here.