Great for the price......Can't imagine putting 4 adults in it though..
Have only had for several weeks. 
People at Wayfair very friendly and helpful. Can't say as much for manufacturer's tech support guy when I had a few questions. He told me I was over thinking things and the instructions were written in Japan... Not too helpful for a first time owner trying to figure out how to use chemicals and also trying to put together a cover mount bought as an accessory.
All in all I'm very happy. There are some rough spots on the insidewhich feel wierd, but like I said for the price it's great...