Fantastic property, exactly where you would wish to be located in Porto. The property was spotlessly clean and well maintained. It was surprisingly quite, considering it is on a busy street. The ORM were brilliant - they told us anything we wanted to know about the area and the property and also found out information that we requested.
We hired bikes and cycled on the south side of the river towards the estuary, stopping for lunch at the fishing village - a great half day trip.
We walked to El Courte Inglise, which is a huge department store in Gaia to while away some time before our airport pick up (which ORM arranged).
We loved Porto and would definitely rent the same property - I don't think you could find better.