Great bang for the buck
I did a "quick install" of the Cyclone on a Mongoose Malus fatbike, and I'm really impressed with the performance. Absolutely a great deal in grins for the dollar.
This is not a "turn-key" kit. You will need a bit of machinist savvy to really mount this motor well but the results are definitely worth the effort. My build on the Malus used the Cyclone 83-110mm square BB which fit that frame nicely. For chainline adjustment I made a couple of custom 12mm-long round spacers (and purchased two ~12mm longer bolts), but it could have been passably done with just a couple stacks of flat washers. The big hose clamp and zip tie may look comical at first but they do their job quite well. The motor mounts up nice and solid when everything's assembled.
The Cyclone is pretty quiet compared to the whiny Magic Pie 3 hub motors I've used in the past even with the extra chain/freewheel noise. And it simply humiliates those Pies in a race.
This motor had no problems pulling 55 amps from a 52v pack so heed the warnings, keep wimpy batteries away from this beast or set those controller limits carefully. Running at a 20-30A cruise, the motor stays just warm to the touch, perfect. Highly recommend the Bluetooth controllers, really handy when you're dialing this thing in!
I'd definitely build another bike with the Cyclone, and the way the friends are looking at it I suspect that'll happen sooner or later..