The River Side Hotel is a good hotel with a few issues. The location is excellent to access any part of Tbilisi either walking or by Taxi/Bolt.
We had three issues which lowered our opinion of this hotel: a) breakfast was very poor - the selection was very limited and most of it was not tasty. Though we have a reservation with breakfast, after the first day, we chose to skip breakfast and take it outside the hotel. b) we had 2 rooms - one was excellent, the 2nd was a bit creepy with it's colors and style c) room service was done very late - we came back at 17:00 on one day and the rooms were not done yet. They did quickly come up to make the rooms when we complained.
Overall, it's a fair value for the price paid, but we would have expected more for a 4* hotel with such high ratings on hotels.com (especially in regards to breakfast).