Well, we just got back from the Daytona 500 - 6 days/5 nights of dry camping.
I've had this Honda EU2000is for several years but I just bought one of the extended fuel systems anticipating running it quite a bit during the races. Weather was cool so didn't run the a/c (and it would be a grunt to start one of them with the converter/charger running also).
I ran it a total of 66.6 hours and used 6.5 gallons of gas for a total cost of $22.45 for fuel! You can't beat that.
My Onan 7000 would have used about 60 to 70 gallons to do the same thing so unless you need the amperage, you are wasting fuel running the big one. We cranked it up twice to run the microwave, coffee pot, hair dryer all at once. Otherwise the little Honda did the work.
The overall average amperage I saw was about 7 to 9 amps as it ran my converter/charger, refrig, TV's and digital converter boxes and my wife's hair dryer and curling iron.
I also rigged a neutral/ground bond plug and it worked fine making my Progressive unit happy.