I've had mine for like 7 years now. The plastic choke lever broke. I haven't replaced it because I can still operate the choke. I just reach down onto the carburetor and flip the lever instead of being able to do it from over the air cleaner.
I couldn't match the Nanjing Huade spark plug to anything but Bosch. (Nanjing Huade is Chinese Bosch) I threw the Nanjing Huade in the garbage and put a Bosch Super in it.
Adjust the valves every hundred hours or so....okay....probably more like 150 hours.
I've actually only adjusted them once. Last time I checked, they were still properly adjusted.
I ran it on G-Oil for a change or two but switched to Rotella T or Delo...whichever is cheaper and availiable
The dipstick is definitely underengineered. It's made out of candle wax. Okay, not really candle wax but you get the point. Just be careful threading it back in.
It has over 400 hrs on it now. Before they cleared the trees from the powerlines in my neighborhood, we would lose electricity everytime it would rain. It would run our refrigerator, upright freezer, box fan, radio, lights, and my neighbor's refrigerator. Also used it to power the church band's amps and PA at an outdoor picnic and various Scout gatherings
I'm of the opinion that they are the best of the Chinese gensets.
I'm sure that there are better Generators, but not anywhere near the Champion price. The Champion was 1/3rd the price of the similar Briggs and Stratton powered generator when I bought it.