Dianka's place is a great base for exploring the city. The location is fantastic - smack in the middle of Bairro Alto / near Principe Real. Many nights the street below had live music and lots of activity, yet just shut the windows and there's no problem for privacy and sleeping.
The flat has a comfortable common area, kitchen and cooking supplies, and everything 1-2 people would need to relax. (Please note if you have mobility issues- the flat is on the 5th floor up the stairs.) The multiple windows and fans came in handy during a very hot week :) Recommended !