Gennys:
The first was the 800W HF and it was too loud for a campground. Used once.
The second was a Briggs&Stratton powered 2000W inverter that at least looked like I was trying to be quiet! It worked fine for four years.
I read the entire CPE2000 topic here and then bought the Yamaha EF2000IS in Apr 2013. This is my third genny and I did not want to take any more chances.
The Yammi is quieter at full throttle than the B&S idling on eco.
I started the Yammi to show someone how quiet it was. Of course, you start with eco off. After marveling at how quiet is was, you should have seen his jaw drop when I switched the Yammi to eco. 51DB is quiet!
HTH;
John