I thought I'd save money and explore selling ebikes, and import 6 ebike 250 w 36 v 11aAH kits direct from china thru a alibaba listed company. I ordered the kits in may and just got them a few days ago. What a fiasco. First off after paying customs, brokerage fees, PayPal fees, plus all the headaches and and additional 850 bucks to get them from Ca to Mn I saved only a couple hundred dollars total. We had to waste the entire summer getting them here combined with the months of broken promises on shipping ETAs. The one shocking caveat is that the kits are extremely improved over kits I've gotten from other USA suppliers. Here is the 10 ways they are improved. 1. The controller is built into the battery holder. So it saves on wiring and space on the bike. Granted the old box controllers were small but after all the wires go to it it's quite a rats nest. 2 the connectors are all 100 percent water proof 3 the amount of wiring and connectors are cut in half 4 the connectors are all round multi pin hard rubber style. 5 built in hub speedo monitor 6 the LCD display is smaller and much modernized over what I've seen before. 7 the optional. pedal assist components are built 10 times the quality I've seen before. 8 the optional brake motor cut off switch adds to your existing brake handles Using simple magnetic switches, so they can never break. 9 these new geared brushless hub motors are always totally silent at all rpms even starting out. 10 the motors have more torque than past ones I've used. It was just nice to see progress in quality and simplicity in install with half the wires. These will no doubt filter out to the public in due time. I do not know Reliability nor whether the built in hidden controllers will not blow out, if it does one will have to replace the entire new style dolphin battery holder. I can post Picts if there is any interest.