The sauna took two days to build. Read the instructions carefully. Then read them again. You will be fine putting this together with two able - bodied people. Delivery was curbside-only in my area. Over 1100 lbs total, but no single part in excess of ~ 60 lbs, if I had to guess.
Okay now to the good part: this sauna is GREAT. With the base heater offering (Harvia 80B), it takes about an hour to heat from 65F to 160F. It easily goes up to 200F and that’s when we turn it off. From there it holds over 180 for another 35 - 40 minutes. I love the design. I am 5’5, my husband is 5’8, we both fit comfortably laying down on the top bench (minimal contact). If one of us props up on the backrest, then no contact. There’s about a 30 degree F temp difference from the top to bottom bench. The bottom bench is a great relief when it’s too hot on top and allows a third person to lay flat. We immediately sealed the sauna with oil to give it a protective coat and a lovely cedar smell. I could not be happier!!