The Old Corner House is a great place if you're looking to save some money and be in the heart of the action.
Location - Right in Bairro Alto next to all the bars. Great if you're looking to have a fun time (super lively area). I loved how walkable it is! Also super close to Chiado (shops). I loved the neighborhood, but if you're looking for something quiet, this is NOT the neighborhood for you. It is VERY loud at night due to all the fun things happening nearby. Bring earplugs!
Value - Very good cheap price especially for the location! If your'e looking for something fancy though, I would just look for a hotel in Chiado.
The place - The apartment is really well decorated and has a great view out of the french doors. It's the top floor of a very small building and the steps are very very narrow and steep - I would not stay here if you are elderly or have difficulty climbing stairs (these are not easy stairs to climb). There are also very very narrow & steep steps in the apartment to get to the lofted area - I fell down these once and I am an able bodied person.
The space - This apartment can fit 3 people - a great place to stay if you're looking for a great deal! However, if you're looking for comfort/something nicer, I would look in other neighborhoods and pay more money. The bathroom was small and the lofted area was difficult for me to navigate in (ceiling is so low I had to duck - I am 5'4"). I don't blame this on the apartment - I think this is the nature of what staying in Bairro Alto is like.
Overall, I loved how cute and homey the apartment was and really enjoyed relaxing in front of the french doors. The host was incredibly friendly and welcoming! It's not "luxury" but great bang for your buck.