Javier's place was great.
The apartment is huge. It has a large sofa bed, two single beds (one comes out from under the bottom of the other) and a queen size bed in another room. Two bathrooms, one very large and the other smaller. A huge dining / kitchen room. You can easily sleep 5-6.
The location is what sets this place apart from others. You have a front facing view of Placa de Gracia, the center square of the Gracia neighborhood which is hipster and family oriented. There is a lot of activity at all hours of the day And night in this square, so bring earplugs but we found the life refreshing as other cities we costed such as Venice were completely dead. Each morning locals sip coffee in the square cafes (the crossiants are amazing) while in the evenings the empinanda store (selling only empinanadas) opens and the locals flock there. Do yourself a favor and stay in this neighborhood, it had a bunch of good restaurants, Spanish live concert cafes, spanish dance clubs and cafes, and tons of bakeries.
The location is authentic, Las Ramblas is completely touristy and you won't get any true catalonian or spansih food there. Gracia is filled with children of locals playing soccer in the square and young adults sitting in cafes and bars late at night. It's alive.
The other parts of the city are close by as well. You're 12 minutes walking to Gaudi's House of bones, 20 min to Placa de Catalyuna, 25 min to the gothic quarter (or literally 5-10 minutes to any part of the city if you take the metro which is a 5 min walk away).
Javier was easy to communicate with and arranged for our airport transportation.

I highly recommend staying at Javier's place.