Sylvia was a delightful host, kind and thoughtful with lots of great information. Her place is beautiful and spacious and has all the amenities you could need. It was very convenient to do laundry and then dry it on the lines outside. There are also a ton of outlets, which may sound silly but is an awesome feature when you have many devices to charge!
The location was excellent: close to the metro, though I actually walked to La Sagrada Familia, the waterfront, and Park Guell. Convenient to grocery, fruit/veg, and late night stores (where I found very tasty wine for about 2 euro) if you plan to prepare any food. Also a great kebab place where I got a huge chicken platter, fries, and soda for 6 euro!
I traveled alone and felt very safe. The space is large enough for sharing, and I'd love to return with others.