I never met Joan, but his father is one of the kindest persons I've ever met. Both Joan and his dad helped me when I was robbed in Barcelona.
Please note that the deposit charge is 150 euros, I haven't noticed it before. Since I was left with nothing Joan has been very understanding.
The aparment is ok. It's very close to Sagrada familia and metro station and please, visit the awesome hosputal de Sant Pau which is just 1 min away. It's worth it.