Juan's apartment was wonderful. It is well appointed and spacious for two people. It has steep stairs, but a good light and strong railing! The place was spotless and provided a comfortable and restful sleep. The wifi works well.
The Alfama is a very quaint yet lively area. The winding, hilly streets can be like a maze, but adds to the charm of this traditional neighborhood. This area in particular (as of Sept. 2017) is undergoing a lot of renovation, so there was some construction noise, but only after 8am.
Can be a bit loud at night since there are many restaurants and bars a stones throw away; we found this to be amusing rather than annoying as it was always short lived.
If you want the authentic Lisbon experience, this is the place for you. Enjoy!