I've researched every option for a kit sauna in the US and imho this is the best one for the money. It is a perfect size for 2 people (you can fit 3, maybe 4 if you are really close friends and one doesn't mind sitting on the lower bench).
The changing room is essential for a sauna - you don't lose much heat every time you enter/exit and you have space that's at a comfortable temperature to rest between sessions. The changing room is a good size too - we fit a bench, a couple of stools, the wood rack, and a place to hang robes and towels.
The benches are at the right height - you want to be above the stones for the best experience (we accidentally installed them higher than they were supposed to go and it turned out even better).
The install process isn't terribly complicated (we were expecting something way worse but it was fairly straightforward), though we weren't as fast as the other reviewer. My husband (occasionally with help from his dad) installed it in 4 weekends working maybe 5 hours per day. At least one of those weekends was spent on sorting out the foundation.
We got Harvia Legend wood burning stove, it is gorgeous and gets up to temp in an hour or two, we aren't the most efficient at it yet.
The purchase and delivery process was smooth and every question I had was answered promptly.
If you are considering a sauna, get this one, you won't regret it. The only thing better than this is a complete custom build for a lot more $.

My 86 year old Mom, my 62 year old wife and I, built the entire kit in 3 days. The 3 angle ceiling trim boards, wood stove and roof shingles remain. I'll get those tomorrow.
I can't wait to get a sweat on!