Stayed 7 nights in Madrid and Ignacio's place was perfect for my wife, I and our kids (ages 6 and 9). It is centrally located and within a short walk to metro stations. We did wind up using the metro (using the 5 day pass) more because we had kids, but apartment is withing walking distance to most attractions.

Be prepared for the daily exercise of climbing stairs though (we did not mind since it kept us in shape with all the good food we were eating :) ). We especially liked the fact that we were close by to ethnic food after eating afternoon tapas.

Ignacio was a perfect host, meeting us when we arrived and familiarizing us with his apartment. He also gave us recommendations during our stay.

If we are ever back in Madrid, would not hesitate to rent again.