We had a great time at Martinhos apartment. It was nice, clean, cosy and very central! It has the nicest balcony with a great view of a small garden with beautiful flowers.
The only negatives were the thin walls which made it quite noisy and the fact that the doorknob to the bathroom was very tight, so I ended up not closing the door all the way, because I simply couldn't open it. It was an easy fix, though!
Overall a very nice stay!