Ran into someone down in Tennessee earlier this year, first time I'd seen one in person. He LOVED his. Says it draws very low power, is very quiet and very efficient. It was in the upper 80s, low 90s for our trip at Anchor Down and there aren't really any trees. It gets HOT and the regular ACs struggle to keep up. His little 12K BTU mini split was running with ease and keeping his camper quiet comfy.
He installed the outdoor unit in the front generator compartment, as he doesn't have a genny. He cut out some of the floor to give ample air circulation and ran it with the compartment door open. The inside unit was mounted above his door and circulated the air all throughout his camper.
It was just him and his wife, I didn't even think to ask about how the airflow suffered if they closed their bedroom door at night. Bottom line, he thought it was a great upgrade and spoke highly of it.
Much cheaper than adding or replacing a roof top unit, quieter, less power draw, more efficient cooling, easier to maintain a set temperature, also a heat pump for cold nights. Got me very interested when we upgrade to a 5er in a couple more years!