I stayed for one week with my wife and enjoyed the location near the Castle. Best views are from the kitchen and bedroom, although windows are small. Balcony to the rear looking onto the narrow street. Overall setup is fairly basic, kitchen is very minimally kitted out (lacking basic things such as pepper). Currently major building works to building next door for several months. Early risers will be fine with this (workers start 8.30-17:00) but people who like to sleep it will be woken up to lots of noise.
Lovely cafe just round the corner towards the Castle (Cafe do Electrico) for morning coffees and pastries. Amazing restaurant couple of doors up the hill from there "O Vinhaca" at Nr. 53. Easy to miss as there is no signage/indication there when it's shut! Expect great food and booking is almost essential (small place and only one sitting per night).
Close to the trams and Metro, so easy to walk and explore.