My boyfriend and I stayed with Bruno and Lara for two weeks and it was fantastic! We love them - very nice people and always attentive to our needs. We were invited several times to dinners with their friends and it's all been great experiences. We also loved being with their super cute kitty Figaro.
The apartment is located in an interesting area and close to the water. One minute walk to the nearest bus stop that takes you to downtown. The apartment is very clean and has a cute balcony where we usually hung out when it's sunny. The room can get a little cold in winter, but there's a warmer we could use.
All and all, I would strongly recommend staying with Bruno and Lara for anyone travelling to Lisbon!