We stayed a few days at Tiago's place in early December 13. It was amazing. His place has everything as described. Wifi is great. Rooftop view is great. Heating is great. If we didn't have tours everyday I would have just stay on the roof top and chill out. At night the cable has lots of channels.
The place is very safe; just a couple streets away you'll find some luxury stores. That should tell you how safe it was.
Tiago even left us a box of local fruits, cheese and a bottle of wine. Most pleasantly surprised. Tiago also had great recommendations for food :)
Do give the Da Vinci Italian restaurant beside Pinoquio a shot as well. You'll be pleasantly surprised.
We had a wonderful time in Lisboa.
Only pity I didn't have to time type a proper letter on the typewriter for the guest book haha.