The flexibility of using two of these instead of one larger unit is perfect for me. I use one when I go out in the camper van, and two in parallel when out with the trailer. Two smaller units are also easier to stow than one large one, and I can easily carry them.
Having the 30A plug lets me use the same cable for both uses, saving money and logistic effort. The Honda adapter plug is required, but comes with the parallel kit, so no problem there.
When running the single unit with the camper van, I only use it for an hour a day or so to run the high current stuff and charge the batteries. The rest of the time the van is on battery power. So one tankful of gas lasts for a week or more.
The eco-throttle is fantastic. The unit idles when the demand is low, but automatically amps up when I turn on appliances and then back down when they are turned off. Just great.