Diva 2 is a fantastic base for a visit to Lisbon and Martin is a terrific host. The apartment is very well located - an easy walk to many of the historic sites of Lisbon, the waterfront, Tram 28, the Rossio train station (Sintra) and about a 20 minute walk to the Santa Apollonia station (Porto).
The apartment itself is very comfortable, beautifully decorated, and had everything we needed. Martin met us in person on arrival and walked us through the place and most of the basic operations that we needed. We initially neglected to ask about how to operate the TV (a brief pictorial guide of which remote does what would help - there are 3), but once we got that info, the cable TV service was excellent (not that we watched it much). The wifi / internet was also excellent. Only distraction was some particularly lead-footed neighbors in the apartment above us - particularly in the evening and lasting late into the night. Not sure if these were permanent or transient inhabitants, but would recommend foam ear plugs in your travel kit. Would absolutely recommend this apartment to friends planning a visit to Lisbon - it was delightful.