Gemma and Alex were great hosts. They were out-of-town during our visit but arrange with their PA to meet us in the evening with the keys. Apartment is modern, well-equipped, clean, and very well located if you need to be near Camp Nou.
They were very responsive on queries and communication, and although we never met them in person, seem like kind and considerate people.
Would definitely recommend staying at their apartment, and will stay there again should the opportunity arise.