Harmony's apartment was the perfect place to stay for my first time in Rio. It is centrally located, with a 24hr doorman, and it looks just as good as the pictures posted on this website.
Harmony was super attentive to all my needs and concerns and always available. The one issue that did arise was when I met a couple of cool people from Chile late one night and and invited them back to the apartment. We were a little too loud and the doorman did have to call to tell us to be quiet. This was completely my fault but I would recommend no loud noise after 10pm per Harmony's rules and no guests that have not been pre-approved.
Again, Harmony was a great host and I'd recommend that you stay at her apartment in Rio anytime.