I stayed at Wally's place with my family and we couldn't be happier about our time in Barcelona. The place was great - beautiful, charming and well-prepared with enough space for 5 people.
The location is very convenient. Getting from and to the airport was easy and there is a metro stop nearby that takes to you to the center in 10-15 minutes. There are very good places to eat on the same street and in the area.
Wally himself was a wonderful host - friendly and welcoming with very good tips for our stay. 100% recommended!