Amen was a very responsive host, answering any questions I had. No hassles getting the keys etc. The apartment is just as described in the pictures - very large and comfortable, with all necessary amenities. The neighbourhood is great with a little market, delicious restaurants and bars, and easy access to transportation.
However there is a lot of noise until very late at night (think 4am) coming from the bars. If you are sensitive to noise when trying to sleep, this might be an issue - but for us it was generally fine.