Our stay at Gaudi's Mansard was a wonderful introduction to Barcelona. Enric met us and carried my bag up the 5 flights of stairs to the rooftop apartment. The apartment is just as described - small, efficient and unique. Enric took time to enthusiastically demonstrate the white board and smart phone filled with all the apps anyone could possibly want. The location is wonderful - walkable to most and a Metro ride away to everything. Being so close to La Sagrada Familia was terrific - and seeing it through the skylight first thing in the morning and the last at night made the experience!
Note: As previously noted the apartment is 70 steps up to the 5th floor with more stairs up to the bedroom loft where it is not possible to stand. David, the recommended taxi driver, was excellent for our very early flight.