The apartment is very well located, picts show it well and it has cleaning service, like a hotel, what was really nice. Diogo answered all my questions, before and after I got there. Internet works good and cable too (had some rainy days in Rio ;-).
Overall this is a safe and nice area, close to the beach, to restaurants, shops, everything, you can do a lot on foot, walking and it is a good point to go anywhere else by car, taxi, bus... only downside is that it is kind of noisy... I guess most places close to the beach would be, as there is much traffic. But it is safe and you can walk around like a carioca ; )