Gundega and Antonio are great hosts. They waited for us to arrive and even though Antonio was late for work, he explained in great detail all the great places to go in Porto. They are both very friendly and helpful.
About the apartment, I don't think you can stay in a better place in Porto. It is a very cute and comfortable apartment with an amazing terrace. Besides that it is very close to all the tourist places but you are in a very local neighborhood.
If you go to Porto, make sure you stay here,
Ricardo
p.s. You have to dine at Restaurant Rome