Rafael made us feel very welcome and right at home! He gave us a lot of great information about Lisbon. The flat was extremely clean and homey.
However if you're a light sleeper, you may have some trouble sleeping at night. The outside noise as well as the inside noise (doors slamming, people snoring) made it difficult to sleep soundly. Also, there is no air conditioning in the flat so the only option is to keep the windows open at night, thus bringing in even more noise. The flat was within walking distance to major sights, but I would have preferred to be somewhere a tad bit closer to the core of the action.
Overall, it was a positive experience and was worth the amount that we paid. Much better than any old hostel :)