Mario is a very caring host and communication is quick and easy. His apartment is perfectly situated to explore Barcelona, you can reach the subway within 5 minutes by feet. The windows are good noise cancelling so you nearly hear no traffic outside.
We had, due to some failed installation works in the house, no more water supply for 2 hours on Friday afternoon but when informing Mario he immediately took care of that and, when first solutions failed, he even appeared at the apartment to check on what is going on, and the problem had been solved then. He gave good advise about good restaurants to recommend. We had a good time there.