Good place to stay of you’re in Lisbon for a few days and you want to be right next to the party scene. Gonçalo and Miku are nice, helpful and flexible; and you’ll need minimal contact with them to check in and check out.
I’d say however the place is small (not just cosy) and noisy, which is to be expected from its location — but you have to be prepared for the street not to quiet down till past 2am, even on a weekday. There’s also a bit of a weird smell from the bathroom. The flat is extremely small so it’s not a place I’d recommend working from or if you’re planning to be spending a lot of downtime in.
Otherwise, I’d say it’s absolutely fine.