If you are traveling with a small child stop looking at other listings and book this apartment immediately.
Location: perfect; all the restaurants you'll want to dine at while in Lisbon are within blocks, many within 2-5 minutes by foot; near all of the major points of interest as well.
Amenities: Everything you need for a stay--dishes, cookware, washer/dryer combo, baby/kid toys, crib, baby bath tub, etc.
Communication: Pedro and Ana are very quick to respond to any questions you have. They also meet you when you check-in and go over everything in the apartment. The apartment also has a binder full of tips/recommendations (restaurants, pharmacies, hospitals, taxi/train info, everything you can think of or didn't think of).
Final word: Pedro and Ana are the kindest people you will meet and do everything to make sure their guests are taken care of and comfortable.