Augusto is a nice welcoming guy and his place is well situated in terms of the tourist tramline and walking to decent nightlife. (It's also opposite a homeless hostel ...but we had no issues with that as it did not affect us).
The only problem is the size of the studio - it is cramped unfortunately.
e.g. : if you sit on the toilet you have to place your legs to the right because the sink is so close. (I am not tall!). The bedroom area is also similarly tight.
However, If I was visiting Lisbon again on my own I would definitely be happy to stay there ...