Nonickname, you're correct. A lot of smaller outfits are making deals to plug in their trucks for overnight stays. The larger companies, like the one I drive for, try to make sure that I can get the breaks I have to have without running the tractor during those breaks. We are restricted by law on how many hours we can drive per day. Yes, some people have more than one book but, I don't really find the need to do that. I do however, shut down for three to four hours at a time without any problem. As for the type of unit mentioned, I have yet to see one but I do know of a few who have and they were impressed with the overall operation of it. Who knows, maybe there are better mouse traps out there.