We stayed 2 nights at the RingHotel Celler Tor.
The positives:
The front desk staff were very nice and helpful
The shower had excellent water pressure
The room was clean and tidy
The included breakfast was very good, nice variety of things
The Negatives:
NO COFFEE IN THE ROOM
The Air Conditioning in our room didn't appear to work. I opened the windows and it was cool enough outside that the room was always comfortable but during a hot spell I have my doubts I would enjoy that room.
The room was small, bathroom door couldn't be opened all the way because the bed was in the way
The bed was very, very hard. I asked for some foam on the bed and our second night was much more comfortable.
Overall, it's a decent hotel BUT the price and image it seems to try to project doesn't fit with the amenities probided.