Vitor is a great host! He's always available when you need him and he has plenty of recommendations on how to make the most of your time in Porto.
The place is just as seen in the picture.
About the bathroom, I think it's a good solution. I'm tall so I was not 100% comfortable, although it did work for me because I was alone.
The place is extremely clean but the pressure in the toilet was not good so I had to manually pour water into it.
Bear in mind it's a 4th floor walk up, although you'll be going up and down all the time in Porto so this shouldn't be an issue!
I would recommend this place for a short stay in Porto. The location is really great. You won't need to use public transportation at all.