This place was perfect for me as a solo traveller. I think two people might find it a little small! There is a great shower, the heating was good and the bed was comfortable. The wifi worked perfectly and there are usb charging ports.
The self check-in was brilliant, especially as I arrived late at night - the instructions were really clear.
The location was really good but it is further from the Plaza Mayor than the listing suggested. Still only a ten-minute walk, and I was within walking distance of the main historical sites and the museums. There are two Metro stops a short walk away, and a great food market almost next door.
I did find the area quite noisy at night, even with ear plugs, so keep that in mind if you're a light sleeper! Also, the cooking facility is quite basic - there's a fridge, microwave and one-ring electric cooker. Food in the city is great though!
Overall, I really enjoyed my stay.