This was our first time in Lisbon and Miniflat 3 proved to be an excellent choice to discover the city - it is a very nice little place to go home to after a day of sightseeing. Small but functional, it has everything you might possibly need during a 4-5 day stay.
There are several bus lines in the proximity that take you to the center quickly but walking is also an option.

The hosts are very kind and helpful - Joana was waiting for us at check-in and she even took the time to show around the neighborhood and give some helpful tips about the city.
All in all, highly recommended - would definitely stay again.