This was my second time staying in the Bruna, the last time having been possibly 6 or 7 years ago.
The first thing I noted was that the room had been refurbished in the interim - modern tiling on the bedroom floor and throughout the (smallish) bathroom. This adds to the feeling of cleanliness - the room and bathroom were spotless. Room was a good size for one person.The weather outside was cold, the room was cosy.
WIFI was available in the room and was free. Room safe also free.
Portable TV on the wall.
The friendly owner greeted me by name whenever we passed, though the reality is that because you are given a key to the room, and to the front and street doors, you can come and go freely as you wish.
Location is excellent - and your breakfast room is effectively La Plateria cafe directly across the street - one of the best cafes in the city, in my opinion.
For a budget stay in Madrid, and a chance to stay in the type of house where the Madrilenos live, I highly recommend this hostal.

Hotel Bruna is well located for art lovers and close to Huertas where a big deal of the evening action goes on in Madrid. The hotel is nice and clean. We had a good welcome.
Everything about this hotel was allright, except when you like to have a quiet night of sleep. We stayed there for seven nights and only two of them gave us a good rest. We've changed our room (the other side of the hotel). The building is not fitted to be a hotel. Hall way noises are clearly audible. The pumbler made sure that you will be informed of every leak of water your neighbour uses (tap water or toilet). Thanks to inner courts you can 'enjoy' the evening/nights rituals of common Spaniards. The neighbors of the upper floor did rearrange their furniture several times a week (usually in the morning).
If you're someone who seeks his bed at 1.00 o'clock in the morning and leave already at 6.00 o'clock in the morning, then this will disturb you less. Otherwise...
Nice hotel, a pity about the effects of the construction.

My boyfriend and I stayed at Hostal Bruna for 5 nights. Our usual place was booked so this was an alternative. The location is excellent, right near the Prado, Reina Sofia, 10 minute walk to Plaza Mayor and Puerta de Sol. We never used the metro. Tons of mesones, cafes and bars right on the street. The room was super clean and the managers were very nice. Room included TV, bathroom, desk and basic toiletries. WiFi worked in the room. You come and go as you please with keys to the main door. Off season we paid 55 Euros a night. We had Apt. 1 which was on the first floor with a window into an air shaft which meant it was very quiet from street noise. As in all places in Madrid, yes, the walls are thin and there is some noise from neighbors and other guest. I lived in Madrid for a year many years ago, and this is just how they build apartments. Would highly recommend for location, independence, cleanliness. Note, there is no big sign outside but it is #50 c/Moratin. Ring the bell for the 2nd floor.

The Hostal Bruna is a good budget hotel minutes away from the Prado Museum. The rooms are small but have heating, air conditioning, TV (spanish only) and comfortable bed. Ensuite bathrooms also smal but have good shower.
Rooms are kept very clean. As this is small family hotel, services are limited.
It is located on a quiet pedestrainised street, with cafes etc in easy reach. Try the Sociedad and the Colon for good budget meals.
Main downside of Bruna is the noise. It can be very noisy (doors slamming, people talking, lift) but was very quiet between midnight and 7.30 in the moring.