Nicely decorated place in a very good location. You can explore all of Lisbon by foot if you have the time.
The place itself is absolutely ok. The bed is comfy and the kitchen has pretty much everything you could need for a short stay.
The walls are pretty thin though, so you often hear your roommates, neighbors or people in front of the house - so be prepared for that. Otherwise there are earplugs provided if you have trouble sleeping.
All in all highly recommended!