We (4 adults and 2 kids) stayed at Thibaut's place for over a week. They were great hosts, our flight landed very early in the morning but Paulo was there to meet us at the apartment at some ungodly hour and even helped us find our way there after our cab driver from the airport got lost. Paulo made sure to show us all the facilities in the apartment and even checked in on us later in the day to make sure we had settled in OK and if there was anything we needed help with (he very kindly provided us with details on where to go grocery shopping, etc.).
The apartment itself is very nice (its actually more of a townhouse) with ample space for our family and has all the necessary appliances and utensils. It is much more spacious than the pictures suggest. The private patio is a huge bonus and a great place to spend mornings and evenings. The location was really good - the place is pretty much in the thick of things and has some pretty cool local bars and restaurants within 2 mins walk. The waterfront is about a 7-10 min walk and has a number of bars, etc. as well as a major train station and ferry terminal. Very convenient to make day trips up the coast or go across the river. Chiado square with all its attractions is also about a 7-10 min walk. If you are in Lisbon and want to stay close to the happening parts of town including the nightlife and yet still be in a historic neighborhood, this place fits the bill. Highly recommend it. The hosts are great and very responsive and flexible - very easy to work with them and would have no hesitation in staying with them again.