That is the sauna I purchased. I wanted a 3-person one so it would fit 2 people comfortably. It won't fit 3-people comfortably (my boyfriend and I are not big -- well, we are not obese and still this sits only 2 adults comfortably -- maybe 3 kids, so saying it is a 3-person sauna is an exaggeration.)
The plug requires a dedicated 30-amp circuit though... so watch out for electrical requirements. It is a nice sauna, everyone admires it when they come to my house, and it isn't much more expensive than one of those sauna bags/tents... and the customer service is fabulous.
If you get a smaller one it doesn't require a 30-amp circuit, so don't worry -- just read the electrical requirements!!!