I stayed in Pühajärve with my family for one night and it was a good experience. The booking system on hotel's webpage was really messy so we had to use 3rd party website but this was a minor inconvenience.
The room was average but clean and we had a complimentary extra bed for our 4Y old daughter. The staff was welcoming and helpful.
We really liked the pool area - a decent size pool for swimming, couple of kiddy pools and a jacuzzi with an amazing view. I think there was a sauna or two as well but we did not visit these. The focus of the hotel is on treatments not the saunas and water area.
The breakfast was really abundant and tasty but this huge hotel had only one coffee machine (which was also slow and needed constant cleaning)! As some people drink coffee in the mornings there were two options - stand in the line for 10-15 minutes (and hope that the machine does not need cleaning in this period of time) or just give up. Many gave up. This fact just blew my mind - just get couple of more machines, there were around 100 people having breakfast when we were there!
In spite of that coffee failure (do not mess with people's morning coffee!), the overall experience was very good and we would definitely return when needing a lodging in Otepää area.More