As a host, I wish clients would only use one host, but looking at it objectively, if you can use multiple hosts, it certainly makes sense to do so. If you are going to use one host though, I definitely recommend doing your home work. The barrier of entry to becoming a host is so minimal (maybe even non-existent) that anyone can come and go with ease. If you're in the USA, one of the easiest methods to gain some confidence in them would be to check the secretary of state to see if they're registered with the state.