Awesome product. Very popular. Warranty support is excellent on it in north america (not so with most of the other honda clones). I don't think it is loud at all. One of the quiter ones, 67db I think. Get em from costco.
There is a thread on RV.net started a couple of years ago on this product. This thread has everything you ever wanted to know about it, including every kind of mod you can think of and all kinds of stuff. Some 600 pages long now.
Many run their AC on the 3000W but you may need to mod the gen or put a starting capacitor on the AC unit. Check the forum.
RV.Net Open Roads Forum: Tech Issues: 3000W Chinese Gensets Info.