Just wanted to share my experience with Chinese direct drive hub motors. Four years ago I purchased a 1000w, 48V rear hub kit from YESCOM, attached it to a Schwinn frame and have been operating it with a 52V, 10 ah battery for errands. Recently, I purchased a 1200w, 48V front hub kit from ebikeling, assembled it to a Bikes Direct three-speed cruiser and
have been testing for several weeks. Both had motors that weighed about 12 pounds, went together easily, have been problem-free, have a top speed of about 33 mph (using a GPS oriented speedometer) and are relatively quiet, but not silent. I've needed to tighten the spokes twice in four years on the YESCOM, but not at all on the ebikeling. Just reporting this in order to assuage fears about the quality of these systems.