Wonderful penthouse apartment, superb host. This was the second leg of our vacation with my wife and kids (5 & 2). Our flight was delayed by a few hours and we ended up checking-in after 2 AM. Jon greeted us in front of the building and gave us a run-down of the building and the apartment's features. He also left a welcome basket with Cava (sparkling wine), Spanish Snacks, Nespresso Pods, and other goodies.
The apartment is well located near many of Barcelona's tourist sites, and we didn't need a taxi very often. The apartment itself is very well maintained and kept to a high standard. Rooftop deck area is very spacious with an outdoor shower and lush greenery. All the furniture, fixtures, appliances, utensils are of better quality. (There is also a washer and separate dryer.)
Kids loved the large custom bath/shower with the rainfall showerhead and handheld spray. My 2yo begged to stay in longer.
Jon was a gracious host, very communicative and accommodating. You can tell he puts a lot of work into the apartment and has refined all the details. I would highly recommend Jon's place.