Ulises' studio was a great place to spend our few days in Madrid. He made it easy to pick up and drop off the keys, and was accommodating to our late arrivals and early departures. He was responsive to our messages, even when he had a family emergency. The apartment is definitely nothing fancy - more like a dorm room than an apartment - but it is clean, stocked with maps and guide books, and most importantly located in an AWESOME part of the city in La Latina. There's a tapas bar on every corner, El Rastro (the Sunday market) sets up right outside the front door, and we walked nearly everywhere we went, including Plaza Mayor, the Reina Sofia, the Prado, and elsewhere. I would definitely recommend a stay here, particularly if you aren't looking for anything fancy.