Just bought this and have used once. I filled with about 1 gallon and was still running 2 hours or so later when I turned it off. Fairly quiet. Build quality appears to be good.
I bought this after Hurricane Sally left us with significant damage and no electricity for weeks. Before the next hurricane we decided a generator was a necessity and not a want. While we hope to never have another damaging storm we are relieved to know we can at the very least comfortably function with hot showers and safe food during recovery efforts.