I really enjoyed my stay at Rui's.
For me, it was a very good location, just south of Bairro Alto and Principe Real. It's a 15 minute walk from Baixa Chaiado metro station. Make sure you take the right exit! You have to climb a hill and then descend and climb again, which is important to know if you are carrying heavy bags.
The apartment itself is on the 4th floor (no lift) but once inside, it's a joy. It's spacious and spotlessly clean. The bed is comfortable and the shower is powerful. There's even a washing machine, which is a godsend after a few days travelling around Portugal. Despite being close to a main nightclub area, the apartment is very quiet at night. So you can go out and still get a good night's sleep when you return.
Rui is so friendly and helpful and really made my stay. He suggested lots of places to go which were really useful.
This place is just up the street from the historic 28E tram route and there's a stop at the bottom of the street. It's a good location because in the early morning (8am) you can get a seat in the direction of the main tourist spots, before everyone else gets on!
Just a block away, is a great place to have drinks overlooking the sunset, on top of a car park!!
Overall, I had a great stay at Rui's place and I would thoroughly recommend it to future guests.