I stayed in the Hostaladriano Adriano for 2 nights. The hostal is on the 4th. floor ( there is a lift) and the entrance and reception area is very clean with some great art work on the walls - done by a friend of the owners, I found out.
The lady at the reception was very friendly and checkin was easy.
The room was very bright and clean, well heated ( because it gets cold in Madrid in winter), and the bathroom was spotless, with one of those half- baths you often find in Spain. The bed was comfortable. The room looked onto an interior but as its the 4th floor there was plenty light
There wasn't any noise at all, the street, though very central is not busy traffic-wise. There are lots of cafes and restaurants in the area, and it's easy to walk to the 3 main museums in Madrid from here.
There is free wireless too.
The staff speak very good English and are very helpful, with a lot of local knowledge.
All in all, this is a great value-for-money place to stay in the centre of a fantastic city.

We stayed at this hostel for over a week, and were pleased. The location was excellent, in the oldest part of Madrid and near everything. The rooms were clean and comfortable. The rooms were small, with a small bathroom, but it was predictably small for non-luxury hotel in Europe. There was a mini frig and a table which made snacking easy. We had requested the back rooms as I'm a light sleeper. Usually rooms with a nice view of the street also can be loud at night. The entryway was locked and well lit, but it is a shared entrance with several other hostals, and was easy to overlook at first.

My husband and I stayed here for 7nights beginning on September 19, 2011. It was a perfect base for our time in Madrid. We were able to walk to all the major tourist sites. Plaza del Sol and Plaza Santa Ana were minutes away.
Our room, #16 was adorable. We appreciated having a fridge and a safe and adequate space to unpack. There was street noise (Madrid is famously noisey), but this was not a problem with the double glass balcony doors closed and the air conditioner on. The hostal was very clean and well organized. We were never bothered by noise from other guests.
The owners of the hostal are involved in the daily running of the business and obviously take care and pride in it.
We would stay here again and recommend it others.

We cannot recommend the Hostal Adriano highly enough.
We have stayed here many times and find the standard of accommodation, service and cleanliness to be consistently high.
It is in a very central location, just minutes from Placa Santa Ana, and has great facilities that far excede expectations - daily cleaning service and new towels, ensuite shower room, fridge, television, safe, and free wifi.
There is even a computer available for use by guests, free of charge.
Rooms are incredibly good value for money and early check in is allowed if rooms are available.