A gorgeous penthouse right on Plaza Catalunya. My fiance and I stayed here with 3 other couples and was a wonderful experience! Great location - there were a ton of tapas places near by and always cabs when we wanted to go sight seeing. It was walkable to the Cathedral which has a market on some days! There are 3 bedrooms plus a pullout bed in the main living room. There is a beautiful patio that we used each night. It's on the top floor and has a very old elevator. We sent one person up with luggage and walked up the stairs. The door to the apartment is finicky but if you turn the key as you pull towards you it's fine! There is also only 2 sets of keys and you can buzz to get upstairs. We were almost always all together so that didn't bother us too much but something to be aware of.
I would absolutely recommend staying here with a group or if you want to upgrade your night stay!