We had a very lovely time staying at Ana's place! It is in a great neighborhood - very hip with lots of great boutiques and restaurants just a few streets away. The place itself is very cozy. In terms of walking to the main tourist places (Las Ramblas, Sagrada Familia), it's probably about 25-30 minutes, which I would recommend, but the metro is also very easily accessible and affordable. Ana is a great host - she checked on us before and throughout the visit. She even helped us find a 24 hour printing service! Thank you, Ana!