My girlfriend and I had a fabulous time in Lisbon. The apartment was very nice, really modern inside with a lot of space. We also really liked the balcony, where we would sit out and look down on the party scene in the evenings. Location was perfect - right next to the street parties which get going Friday and Saturday. If you're looking for a party, this is a great location. Also very easy to walk to the other spots in town.
The only downside of the experience was that our host wasn't very responsive. I emailed her, text messaged her and messaged her on airbnb 2 days before we were due to get there but got no response. When we found the apartment in Lisbon we then got a text to get the key from a man in a restaurant nearby, and then for check out we weren't told what we should do with the keys - so communication could have been a lot clearer and more timely. Additionally, some amenities weren't included as advertised - for example, the hair dryer wasn't there.
Overall, we had a wonderful time in this amazing city and would definitely recommend.