We just returned from the family vacation at Lisabon staying in Helena's amazing apartment. Overall score is 5/5 for every category, and it is 7 out of 5 for the stunning view from the balcony! We were staying 5 people, including 2 kids. The apartment had everything we need for a comfortable stay. Our kids got a separate impression from the double-decked bed, and enjoyed it a lot. Separate bathrooms and bedrooms are definitely making your stay very comfortable. Every room is equipped with a heater, just in case you feel slightly cold during the temperatures drops at a night time. It also has a TV, good internet (WiFi) connection, a dishwasher, a microwave, a hair dryer, a washer, all the basic kitchenware - everything you need for a comfortable stay. And of course a corkscrew was in stock :), it is a must have with Portuguese variety of a great wines selection.

Helena and Carlos are welcoming, clear in communication, are flexible and accessible by different means of communication. A separate thanks to Helena for a welcoming bottle of wine, it was very tasty! We got additional flexibility by checking in to the apartment slightly earlier, dropped off the belongings, and went exploring the city. The apartment is located on a very high hill, which allows you to have and stunning views over the city. The view is almost as good as at the highest point at Castelo de S. Jorge, which is located technically several streets above the hill. Every evening you can enjoy the sunset over the city, so don't miss it! We were afraid the logistics to this hill will be a complicated thing for us and the kids, but actually it was not. Once you learn the short paths, where the elevators are located - it's no problem at all. You can be in the historical center basically within 5-7 minutes.
Helena's place I definitely can recommend for the future travelers!