For me mechanically I like it in this order.
1º Cleanmobile PinRing120... 120 nm .
It raises slopes of up to 71º at high speed, it does not seem that it is necessary to make a great effort in the legs.
With aluminum pedelec in Haibike.....a rocket and cheap.
2º The pw and pwx.
they do not abuse the plastic components, especially in the gears of torque and traction.
3º Bosch,Shimano,Brose.
The worst model of mid-drive to date ....... ¿What gives a 3D printer for you to do the gear at home? ¿And open the mid-drive every 500km?
¿But does it cost so much to do it in metal?