@Tom937 I couldn't answer without having more details on the listing. If this was a budget listing and I was only planning on staying for one night, I might consider it. If it was for a more luxurious/romantic listing where I was planning on spending more time, probably not. In a value priced urban pied-a-terre listing where people are out and about for most of the time, it might be fine.
I'm also not crazy about the top of the box being over your face while you sleep. What happens if that gas shock fails (as they are wont to do)? Two pieces of wood slamming together 6 inches from your face in the middle of the night would probably be a pretty rude awakening.
A good place to look for murphy beds is Costco. They have them available on their website, and their return policy is amazing.