Excellent location in the center. Just a few steps away from Plaza Mayor and Puerta del Sol.
We rented a 3br/2ba unit; it was well kept and had everything we needed. The Check-in process is via a computer screen/key dispenser by the entrance. It was a bit difficult to use at first as we had to check-in our whole party, but everything was easy after that.
The kitchen had everything we needed. Furniture and beds were comfortable and AC units worked well. We only found 1 remote for the ACs so had to share among the 3 bedrooms, so that was a slight inconvenience.
But all things considered, this was a great value - comfortable accommodation in a very central location.