Helena's place is a modern apartment in a great spot of Porto. Not too busy and walking distance to everywhere! The apartment is up a few flights of stairs so you'll get a great view (and great legs haha). Two supermarkets close by so you can get some supplies (they do like if you have the correct change). Give the language a go, the locals seem to love it (and seem more than happy to help out)!
Helena was lovely and gave us a good run down with the map when we first arrived :)