Our little apartment downtown had everything we needed for a 5 day stay in Porto. The location is very central - we walked everywhere.
I think in the listing it mentions there is some construction across at the church right now but if you are out during the day (which you should be! you're in Porto) than you won't notice. As someone mentioned in an earlier post it can be noisy at night but that is the price for being so central and earplugs easily fix that issue. :)
Do try to get to A Sandeiras and also Caldeireiros which are around the corner and have delicious food. That said if you're eating at home the markets near by have the goods for a nice meal and the kitchen is equipped for putting it together.
Communication with Mario was great and check-in/check-out very straightforward.