Ralph's flat was perfect for our trip. Nicely decorated, it is very clean, and equiped with all the amenities (towels, soap, nespresso machine, etc.)
Location is very practical, minutes away from some great restaurants / bars, and a 20 minutes walk to Barcelona's city center. Urgell metro station is <5 minutes walking.
Ralph was very reactive, and even proactive, making sure that everything was going well at regular intervals.
I would definitely recommend this flat, and consider it should I visit Barcelona again