Just spent 8 days in the studio. It was very clean and very hip. I enjoyed it quite a bit. It is very conveniently located right near the Metro and only three stops from my favorite place to eat - Time Out. As everyone else has mentioned, the staircase up to the studio is pretty steep. But, I found the exact same staircases at all the AirBnBs where my friends stayed, so just figure that in Portugal, you have stairs.
Very very easy to get an Uber and they dropped me right at the door. I had Sylvia pick me up at the airport. For me, it was well worth the extra money, as she showed me where to get groceries, which ATM to use, and so on.
She was also available right away both times when I could figure out the TV and the stove. She helped me immediately and was terrific. There were some sodas, milk, orange juice, and water in the fridge - a nice touch.
Overall, a great stay!