Pros:
- Centrally located with easy access to everything you could want to see in Madrid
- Huge space
- Beautiful balcony
Cons:
- DSL based wifi. Couldn't handle more than a couple people using at a time.
- Only one key. Made it challenging to split up a group.
- So many prostitutes. Apparently Calle Montera is known for its prostitutes and oh boy is it ever. There were 2 to 10 outside at almost all times of the day. No issue if you are a woman, but they will hassle you if you are a guy walking alone or in a small group.
TL;DR. great location with some flaws. Overall would probably recommend.