We stayed at Gonzalo's for four wonderful days and really loved it!! He has a beautiful apartment in the middle of La Latina, bars outside everywhere (great food! cheap beer!), and it's walking distance to the pedestrian area in the very centre.

The apartment, situated in the second row (and therefore you don't hear any street noise), is exactly as it looks like on the pics. Gonzalo equipped it with much more than you would need on a weekend trip to Madrid, if you have great bars just next door ;-)
We can only say thanks for the stay, great apartment and of course: 5 stars!