My boyfriend and I stayed at Patricia's place for a week over New Year's, and it was extremely well-located in Copacabana. It's a very secure building that's close to the beach, stores, and the metro. Patricia emailed a few times with helpful information before our arrival and was waiting for us with everything ready when we arrived. Her apartment has all you need to feel at home, and I'd recommend it for a short or week-long stay. It was a quiet building with lots of families, and we felt very comfortable. Patricia has cats, so be sure to ask her about them when making your plans to arrange what might be best for you.