Mário is an great host. He is very quick to communicate and is accommodating if anything is off. The space is very clean and has the basics plus a washer and dryer which is really helpful!
The only thing I would advise is that the apartment is not a great spot for long term stays. I was there for one month and a half and the space was just too cramped for a comfortable day to day living situation. However I would highly recommend for a short term stay or holiday in Rio because the location is amazing with the beach 5 mins walk, a grocery story very close, lanchonetes and good restaurants around general Osório plaza.