I have to start by saying that my stay in Porto was much better than I had anticipated, and much of this was due to me choosing this Airbnb. I have stayed in multiple Airbnb locations in the past and this was easily my best experience. For starters, the apartment was exactly what we needed. I was part of a group of 7 friends, and we had more than enough room for everyone. There is two quaint balconies that both offer amazing views of Gaia, Porto, and the Douro River. The apartment is clean, well decorated, and had new appliances. The apartment itself is only about 150 meters from the Dom Luis I Bridge. Not sure what else you need.
However, what made this my best experience with Airbnb was our host Telmo. He was very accommodating and easy to communicate with during our trip. Upon arrival he greeted us with a bottle of wine and gave us recommendations about Porto. He took us out on a boat tour down the Douro River which was an awesome experience. Also, we had late flights Sunday night, and even though checkout was 11 or 12 (I forget the exact time), he let us keep our luggage at the apartment until we were ready to go to the airport, which was about 5-6pm. Now, even if you don't anticipate needing to stay late or and don't want a tour down the river, having a host like Telmo will in some way make your trip better.