In general we found 'the cave' in the Manor House to be extremely noisy - every foot fall of people on the floor of the unit above could be heard loudly a metre and a half above the bed well into the night. The seagulls outside on the lawn squawked constantly and loudly all night, and the light rapid transit train crossing the bridge was an added distraction from sleep. There was a damp, malodorous smell in the unit that was especially bad the morning we left and in the shower area there was green mould on the rock floor. The bedroom area has an extremely low ceiling - too low for anyone 5'9" or taller to walk upright, and the television room below was much the same. The TV did not work and had no instructions.
In general we found this place to be totally in contrast with the AirBnB we had for 6 nights in Lisbon - yet it was $40.00 more expensive per night....
Porto is a great city, but sadly this was not such a great place to stay in. The only real asset is that it has a good location and the host met us nicely and gave us some tips about where to eat (although one of the restaurants we walked to in the rain was closed).'
In general, we really can't understand why others are so positive about this place - maybe smaller, heavier sleepers, and less sensitive to damp smells?