Ines & Jepis's apartment was fantastic. It was clean, centrally located, and very spacious. It was perfect for our family of four. The apartment is very centrally located - it is in the 'modern' district, but really only a few minutes walk to the 'old/classic' district. There are many good restaurants close by and for all budgets. It is a short walking distance to many sites and streets like some of Gaudi's works, Las Ramblas, and Placa Catalunya. It is also very close to the Metro, Taxi stands, and bus stops so getting around the city was really easy.
The apartment itself is well designed and has excellent amenities (wifi, washer/dryer, cable TV - though why watch TV when you're in a fantastic city!). For our family of four (including two young children) the layout of the apartment is ideal.
Check-in was easy and we were even allowed to do it early. Jepis met with us and was great. He also had several local tips that were very helpful. All in all, I would definitely stay here again, and would also gladly recommend it to family and friends.