Nikolas is a great host. Super fast response and perfect communication (in several different languages).
The apartment is in a super location and is only five minutes to "Plaza Dom Duarte". From there you will have access to most of the public transportations, train, metro, bus, and even Tram No.28. Except that you will be also with walking distance to many bars and restaurants including Ramiro. If you want to watch the sunset you can go up to "Miradouro da graca" which is also not far away from the apartment.
In the apartment, you will find everything you need for your stay in Lisbon. The apartment is sparkling clean and very stylish decorated. Plus, great view from windows/balconies.
My parents and I did enjoy a lot while staying at Nikolas's apartment, and I would definitely recommend to any visitor who comes here. :D