I have just recently started using my 3KW unit. Like most others found, the first day of charging up the unit there is plenty of fan noise, but very little thereafter. However, I haven't yet put the unit under major load with kettle or microwave. I've only used it for work (Corei7 laptop, 32" 4K...
IIRC there was a beautiful silver one they brought into the country when it first launched that the motoring mags were testing. I'll always remember that car for the fact that Senna had his imprint on the car's development and set up back in the day when McLaren Honda were near invincible.