I like when we stop to eat on the road, or bunk down for a few hours, to be able to kick on the onboard Onan generator to run air, heat or microwave. Sometimes when it is super hot, we might kick the generator and air on while checking in too. I also run it about once a week to keep it cycled. I can do the vacuuming of the floors when I do am running it without plugging it in. Also resale value makes a difference.