Good:
Situation 5 min walk from Copacabana beach
Lots of restaurants and shops around
Secured building with good services: swimming pool, gym, sauna, and housekeeping included in the price.
Paid service: laundry / no washing machine in the flat
Bad:
The bedroom looks like a closet: three mattresses were lying against the wall, an old microwave, an old tv, some leftover paint were in the wardrobe; half the cupboard was full.
The main room was not comfortable and made me feel like I was in a waiting room.
Tiny kitchen badly equipped: old things more and less broken. Old pans, blender with missing parts (so no blender), some empty beer bottles were still in the flat, the microwave didn't work so we had to ask for them to fix it, no change of bed lining even though we stayed one month (we had to ask again).
The fridge was so noisy that we had to unplug it—52db, the noise of a passing car under your window, all day and night long. No rest. When we asked if something could be done to fix it, the answer was a no.