Yeah I did a couple of years with a 1.5kw and since Christmas with a 3.0kw.
I can't get 3.0kw with 48v system though, this heavier, wider motor can't really do much more with my 55 amps than the 1.5kw motor was doing (good for over 2kw).
The beefier motors are built for higher voltages, this 3kw nominal is said to produce up to 8kw with up to 120v so I'm going back to the 1.5kw unit as I'm staying at 48v.
True they're bomb-proof, though. I've smashed two rims, like snapped the rim, egg-shaped, bent spokes, when I've misjudged kerb height on two occasions. No problem for the motor.
Also I've ragged it across town averaging 44mph and barely heated the motor up.
The big three Chinese companies have built literally millions of these now, and that's reflected in their development. The quality is no-nonsense old skool bomb-proof.
They just work. And along with the computer, regen, throttle, lock and PAS, all of which I can fine tune to my preference (soft-start etc) my bike is now the perfect tool, perfect weapon you could say, and it just delivers - day after week after month after year.
But shush! These are the glory days, where they're a well-kept secret...