Our stay at the hotel was ok. The room is small but perfectly adequate. The hotel is unfortunately very noisy, but the location is very good. We did not book the breakfast, but it looked quite nice. The check-in worked without problems. Unfortunately, the air conditioning did not really work, so we had to sleep with the windows open. There was a small fridge but it didn't work at all, it was warmer in there than in the room with the windows open. The contact person responded very quickly to chat requests.
On the whole, our stay at the Griffoni Hotel was completely ok, since we were most of the time in Venice on the road. Unfortunately, it is way too expensive for what you get.