Yesterday was the first day I could try my YosePower kit, the 26" rear hub variant in all black - 350 Watt nominal power, disc brake compatible (but not compatible with hydraulics and Hollowtech cranksets)@36v, The Yose max watts I saw in PAS 5 was 705 with my 20a controller
In addition to all that has been said, and which I can confirm, the controller supplied with the kit seems to deliver a maximum of 475 Watt to the motor - at least that's the largest number I caught on the display. That would translate to roughly 13A; my 10S3P battery pack (of LG MJ1 cells) should be able to deliver significantly more, at least in peak.
I was surprised to note that the highest speed indicated on the flats was 36 km/h (full throttle, thumb throttle), with wheel size configured to 26" to match the 26" wheel. It's comforting to see this matching the 22.5 mph documented above. I have yet to make a confirmed measurement of that speed (GPS, calibrated speedometer).
For me, the package was about 2 mm too wide to perfectly fit into my full suspension rear end, so I had to pull apart by hand the frame a tad. I decided to go with a 160 mm disc to make use of the existing Shimano XT mount configuration. There is about 2 mm of clearance from the break caliper body to the motor case - so this _just_ fits. (Moving to a 180 mm disc would offer ample clearance.)
I am rather positively surprised about climbing performance. The motor accepted all challenges willingly and only in the most challenging cases required (any) pedaling to make progress. I have no hard data for this (yet), sorry.
So, based on first impressions, and this being the first ever electrically assisted bike I have ever ridden: This seems to be quite a nice package.