The place was really nice, very clean and comfy. The small kitchen was perfect and well equipped (nespresso machine, kettle, plates, microwave etc). Nice bathroom with a big shower. The apartment is in the heart of Madrid, so a lot of the tourist attractions are at a walking distance, also a lot of shops, bars and restaurants nearby. You should consider that this also means that it can be quite noisy in the evenings or at night.
The communication with Ye deserves 5 stars, answers are almost immediately and the check in and out were perfectly well organized.