This generator works very well. Unfortunatelly, the model T07573 is sold exlusively at Costco. The price is almost a half of the model T09275 (11400W) and way less expensive than the matching model T07571 on FIRMAN, which is out of stock.
I use it with propane (LPG) as it is more convenient to load and unload. LPG gives 6750W when running. Still, it can power the house. 8-gallon (30-liter) gas tank is a great addition that will give extra power when needed. But it adds extra weight to existing 230lb (103kg) to move it around as a single piece.
Performance is great. During use of my welder Lincoln Electric 180 Amp with 230V input the input current is 22.5A the generator output voltage does not drop and the sound of engine does not change a lot.