We spent 6 nights in Felipe's apartment.
The location couldn't be any better. It's right on the corner of Ipanema beach, there is a Zona Sul (supermarket) right across the street and its a 2 minute walk to one of the main streets of Ipanema (for shopping, bars, breakfast and dinner). Right in front of the building taxis and busses stop to take you anywhere. Although we had one sort of incident (we seemed more a coincidence) we felt very safe in the neighbourhood as well.
On the apartment itself; it's spacious, has a good living room / bedroom and even the doorman is friendly. Felipe seems to be constantly improving the apartment (which is only necessary to get the place 105% perfect).
Next to the location and the apartment Felipe is a good host. Definitely not short on tips ;-).
Conclusion: We would definitely recommend. It's a good spot to unwind after a beach day or a day in town.