Nice apartment, very clean and tidy, close to the metro station (1 min walking). It has a washing machine, so it's a plus if staying for more days.
On the downside, it is located at 3rd floor, without an elevator (if traveling with babies with strollers or with big luggages, consider this aspect). Some of the furniture is worn out, especially in the kitchen. There were no toiletries (no soap, shampoo or shower gel).
Ruben is a very nice and responsive pal. We had a late flight in our last day, and he let us store our luggage until the evening, so was of much help. Thank you Ruben for this!
All in all, was a good venue, which needs some improvements to be really awesome.