This place is perfect. Its in the heart of the city and really is walking distance to everything you could want to do - including subways, buses and trains. You have plenty of restaurants around (check out "the mill" for breakfast or lunch). Tram 28 runs near by but we didn't hear it all night like some said in the reviews, perhaps in the summer, I'm not sure.
The space is small but definitely not too small. We were 2 adults and and had plenty of space to put our things and move around. Its very well organized as well and so sparkling clean (I mean really clean). Grinuy left us a nice bottle of wine as a personal touch which we found a very nice touch.
You have all you need, blow dryer, heater, fan, iron/board, hangers, soap, shampoo, toilet paper, dishes etc (did I mention how clean it was...?).
When I'm back in Lisbon I will definitely stay again. Grinuy is also helpful for arrangements and information. Getting in was hassle free, door codes all the way and she allowed us to check in a couple of ours early.
Thank you Grinuy!