This place is a scam. I strongly advise staying away to avoid issues.
The hotel's description indicates that check-in begins at 2 pm and ends "anytime", yet the fine print states that the front desk is open from 9am to 9pm and late check-in can be arranged by contacting the hotel.
I needed to check-in after 9pm so I messaged the hotel twice and received no response. I called their phone a dozen times between 9am and 9pm and no answer. Even after trying an alternative phone number listed on the hotel's website, I discovered it was out of service. Contacted hotels.com and they were not able to contact anyone at the hotel either.
I arrived for check-in at 11pm, doors were locked and no one will answer the intercom. I tried for 30 minutes with no luck. Contacted hotels.com and they were again unable to contact anyone at the property. They even emailed the management and 48 hrs later no one replied.
Consequently, I was left stranded in Madrid at midnight with nowhere to go, forcing me to book the nearest reasonable priced hotel which cost $220 per night.
The following day, in hopes of check-in since I had booked a multiple night stay, I went to the hotel at 9:30am and 10:15am, only to find doors locked once more and no one responding to the intercom in the building. Once again hotels.com was not able to contact the hotel.