Diogo & Daniela are great hosts!
And the appartment is really great... it's beautiful, well furnished with a lot of style, well located (I can imagine a better location at Porto), quietly, clean, and the bed and pillows are great! I slept like a baby lol.
You have all kind of facilities nearby (grocerie stores, drugstores, shops, good restaurants, metro station).
Besides all of that, the hosts answers really fast all the questions you may have, and are always available to help you.
I just loved it and recommend!