Our room was very basic with old (not antique) furniture. There was no air conditioner in the room, only a fan. This was fine since the temperature was ok, but it would not have been fine in a hot day. The room was not very clean (but I am picky), especially the bathroom, but everything worked. The breakfast was included and very good. This was at the hotel Iruna, which is part of the same group and is next door.
The front desk staff was very nice and helpful. We asked them for a good restaurant / directions and they were very kind and polite.
The location was fine for Mar del Plata + we were in a tight budget. All this considered, this was a good hotel for the price, especially with breakfast included. However, they certainly need to lower their stars to 2.