We are impressed with the quality of the sauna. It is actually constructed of wood rather than pressboard, and the fit and finish are much better than expected. It also has a lot of decorative and useful touches we didn't expect.
The walls buckle together so there aren't a lot of fasteners used for assembly. We did add our own screws to attach the floor to the walls so we can push it to move it. This is 220V power so it has no trouble warming up and can really make you sweat. The controls are easy to use and the lights and sound are great. I did have to install a new 15A circuit and outlet for it - an electrician may be needed if you can't safely do this yourself.
It comes in 3 very large boxes on a pair of pallets and some of the pieces are heavy. You need room to unpack and lay out the pieces and it takes two people (my wife %26 I were able to unpack and assemble it with a bit of physical effort).
It's roomy for one or two people. A lot of the saunas we looked at are very small, and didnt have a lot of features. With one person, you can lay on the bench with your feet up on the wall. The bench could be an inch or two deeper, and the floor grating could use a support strip down the middle to feel more sturdy, but that's the only suggestions we have for improvement. We use the sauna daily and love it. Hope it holds up over time.