This incredibly economical sauna is amazing, super easy to put together, it gets extremely hot in about 10 minutes (I prefer to keep it at around 100-110) with tons of steam! You can absolutely fit two adults but the two chairs that came with it, while functional, are tiny and not that comfy. I would say it is a bit cramped for two and because of such, my husband got his foot too close to the steamer and got burned by it. Again, it gets boiling water hot so be extra careful around the steamers. I decided to make it a little more one person comfortable by putting a zero gravity chair in it instead. I can recline back and keep my insulated water bottle with cold water in its tray next to me. I am loving it! Highly recommend.