So far so good!
Ordered 2 kits, both with batteries. Took a little longer than anticipated to arrive, but did eventually. Installation is fairly simple, but just be mindful of the bike you are putting them on. We put them on mid-range trail bikes and after a few little tweaks was on. Things to note. You WILL need to upgrade your chain to an e-bike one. Our bikes were both 12-speed, and we are unable to use the first 2 or 3 gears as there is too much of a stretch on the chain, so really better suited to either 9 or 10-speed bikes. Overall performance has been excellent, very punchy motor and hitting 100 km on a full charge exceeded our expectations, so awarding 5 stars!