My stay at Eduardo & Elisabete’s place was my most comfortable while in Portugal!
It was well heated (as I was there in the off season), had a comfortable bed (with locks on the door for extra security albeit not needed), and there was coffee available for the morning. They even left some Port for tasting! The shower had good heat/pressure, and there was a good hairdryer for use. The place felt a bit larger than other apartments, and there is a large sitting room with a great t.v. There is even a washer/dryer - but be warned to ask them how to use it as it is different from those in the U.S., with the washer/dryer being the same unit and it would be tricky to figure out without asking. The unit is in an excellent location, but be prepared to walk some hills as you will in most places in Porto! It is very close to the train station, which was nice.