We've installed hundreds of them, and pick up new ones to service every year. As a home standby generator you can't match them for the money. Miles ahead of Briggs, half the price of Kohler
You can make a lot of money selling and servicing them
Same with the Cummins home units
They do their job but they are tested to do what they are called on
Lots of Chinese parts inside
A Wisconsin kubota Isuzu Onan j range ford lima…. I could go on….
All turn half the speed hold twice the oil
All are very conservative in their ratings
The light standby units are delicate things
Prone to breakdown fast to wear out and often scrapped out because parts quickly become unavailable
But the light units are cheap
Very inexpensive and they have put a sizeable home back generator in the affordability range of almost every home owner
But in days past a home back up unit might be an Onan you were looking at something that might cost as much as a small car
To the end you get what you pay for
Your mileage may vary