The apartment itself is clean, spacious and modern. It's also really well located, with only a short walk to the heart of Condesa or Roma Norte. There are tons of bars and restaurants around, as well as just pretty streets to wander along! The hosts are really quick with communication and very helpful with questions.
The main issue we had with the apartment was the noise. As other reviews have mentioned, there a lot of street noise which doesn't normally bother me because we live on a busy city street at home. The apartment gets pretty hot, so leaving the balcony door open does make it louder, but for me the bigger issue was noise from the neighboring apartments. While we were there, the neighbors were up all night, playing dance music, talking and more...we could hear everything through the thin walls.
The apartment has a lot of great things about it, but bring ear plus or headphones you can sleep in, just in case!