The location is fantastic, right in the Center of Porto. You can be down by the river in 1 minute, and every other major landmark is within walking distance. The street has many fantastic restaurants to choose from which I'm not sure I would have found otherwise – if you stay here, you should definitely try the Holy Sandwich place, the Tokko sushi place, and the Curioso cocktail place.
The place itself was a bit damp but thankfully the host has provided a dehumidifier which worked well. This is probably what most of the houses on this street are like, so it's the downside of staying in the historic center (the houses are old, but beautiful!). The studio is great for a couple of nights – I would stay here again if I find myself in Porto again.