Gotta say i am very pleased with mine.
You have to basically be listening for it to know its running when in the living room/kitchen. in the master bedroom, with the genset directly under the bed, its alot better than i had thought. minimal vibration, no droning, but its obviously audible.
If your one of those people that NEED their genset running 24/7 (seriously what are you running at night that cant run off 12v or an inverter!, though a/c can be handy some nights) and cant sleep if their is any noise at all, then its probably not for you.
'14 XLR 395AMP
'16 Ram 3500 DRW, 6.7 cummins w/aisin trans and 4.10 gears