We stayed in the apartment for 3 days with a 6m old baby. The apartment has lots of space for people to sleep, easily would suit 4 adults. The kitchen area is well stocked and you can eat at home if you want.
The area outside the apartment block is really pretty with lovely plants. The apartment itself is styled really nicely and is modern.
There are a lot of steps leading up to the apartment block and the area is very hilly, as is much of old town Lisbon. For us the steps weren’t ideal as we had a buggy for the baby. Also our buggy is quite wide so we had difficult fitting it through the front door. The high chair provided was great. The travel cot wasn’t very good quality, however I’ve never used one before so maybe they’re all like that.
I’d stay in the apartment again with friends or as a couple but I wouldn’t stay with a young baby just because of the steps 😊