Stop looking any other apartment around Lisboa. Stay in Rita place! The apartment is clean, beautiful, new, and modern. It also has a PERFECT LOCATION, trust me.. its located in the most important part of lisbon (everything is walking distance and you have really good restaurants around). The only reason why you should not stay is if you have any type of back surgery, the apartment is in the 4th floor of the building ( with a great view and balcony) and there is no elevator so probably depending on your age or any type of physical problem, you might consider staying here because you will need to carry your luggage all the way to the 4th floor.
In my case, I wil stay always in this apartment, it is totally worth it the 5 minute extra it will take to carry your bags. Also Laura and Rita are always communicating with you and give you an excellent service. Recommended 100%!!