I stayed 2 nights at Guilherme's place in February 2014, and had a really great time!
Guilherme is a really cool guy, nice to chat with, but also leaving you a lot of privacy. The location of the building is perfect, so close to the metro and to the beach, but still really quiet compared to other places I stayed at in Rio!
The room has everything one needs!
I'd definitely recommand this place, and regret that I did not stay longer to get to know Guilherme better, and to have more Rio fun! Next time...!