It was a pleasant stay at Erika's apartment. Location is not the best, however, we haven't had many problems reaching all the popular tourist places on foot (on the other hand there's a metro station not that far). The neighborhood at first does not seem very safe at first, but we haven't had any bad experience with it.
The room was quite small, but it's enough for two people. There were 2 closets so plenty of space for stuff to put.
The bed was comfortable, but there were only one blanket for two people. We used one, it was enough, but it could be more comfortable having two separate blankets.
Having in mind rooms cost it's a great money value.