Overall, it was a good stay! A few issues that I think are necessary to mention are the door/lock, AC, and lack of a trash can. The door that enters the apartment is extremely difficult to open. Every time we needed to enter, it took at least 10 minutes of wiggling the keys and patience to open the door. The AC does work, however, it has a hose and vent attachment that are not connected to a vent so it blows hot air back into the apartment. We sweat every night due to lack of good AC (even with the windows open). You can make it without a trash can if you use a plastic bag or something from shopping but the only trash can is the very very small one in the bathroom.
On a very positive note, the apartment has great storage and sleeping options! The kitchen is fully stocked and the fridge is full size. The decor is very cute and the apartment was very clean upon arrival. It had the best bathroom of any Airbnb I have ever stayed at. Check in and check out were very easy. You'll need to communicate with them about receiving the keys for check in so if you're not from Spain, make sure you have cell service!