I stayed in Tezh Ler with my father for 2 nights over Easter.
We had a great stay - breakfast & dinner were very good, particularly the special dinner on Easter Sunday. There was also a bonfire that night, and other events, which we enjoyed.
The room & bathroom were very clean and comfortable, and the staff were very nice.
The wifi was the fastest wifi that I have seen during the past 2 months travelling in Iran, Armenia & Georgia.
The surrounding area is nice for walking in the forests & fields, and we passed a lot of our time outdoors.
On the first morning, I went jogging early (7am), and I was bitten on the leg by a neighbour's dog (belong to owners of the restaurant near the main road).
The dogs seemed to be tied up during the day, but be aware if you are going to ramble early.
Overall, we had a great, relaxing stay at Tezh Ler, and I would recommend it to anyone who wants to get out of Yerevan for a few days - but I would rate their neighbour's dog zero stars !