This is a lovely house. Beds comfortable. Kitchen and living spaces well appointed.
We stayed there with eight people, and I probably wouldn't have many more there. There are three showers, all of which are ensuite, but not all the bedrooms have access to them, so could be a bit tricky if you don't know each other very well.
The swimming pool is really just a deep (and kinda dirty) water feature.
The house is a bit further out of the town centre - maybe a 25 minute walk, but this means that the neighbourhood is nice and quiet, and Uber is pretty cheap in Porto.
There's a flight of stars down into the house from directly behind the front door - worth baring in mind if there are any injuries in you party.
The staff at reception were incredibly helpful - they printed out our boarding passes and let us check in and out at our convenience.