We have been to Spain many times and have seen lots of rent-homes.
The flat was not like the ones we were used to,it was clean and very comfortable. You should not await the standards of a 5 star hotel though.
Ricardo is a very nice bloke, he showed us everything and offered us put us on the guestlist if we wanted to go in any of the "nicer" clubs where you would normaly pay a lot of money to get it.
The apartment is central but surprisingly quiet. We think It´s normal to hear cars on the street.
There is a very cheap bar/restaurant, normal supermarket and 24h supermarket just beside the flat, that was great.
Rambla de Catalunya is 5 min away, the big Rambla about 20 min (walking).

Theres a washing and drying machine, good smelling towels!!, hair dryer and an iron ( hidden in the wardrobe which is difficult to open). You might have to buy more toilet paper though ;)

Metrostation DIAGONAL just a few minutes away, from where you can get easily to the plaza Espanya to take the bus to the airport (IMPORTANT: ignore Google,do NOT take the Aerobus, take the bus number 46!!!!!! tickets cost only 2,15 in the Aerobus you pay 6€)

We had a great time and would book again at any time!