I only stayed for a night because I had a layover in Madrid. I would definitely stay longer next time since the location was clean, check-in was easy (you do need to have mobile data on your phone though) and it was easy to reach with public transport from the airport. The room was clean, had a small water kettle, the bed was clean and comfy and two towels were provided. Definitely a good choice if you're on a budget and staying for only a few days.
The only negative aspect was that there was no remote to control the A/C in the room so it was slightly cold. Nonetheless good experience.