This was my girlfriend and I's favorite AirBnb that we've ever stayed in. The location is truly unbeatable. It's steps to the riverfront and a quick 15 min uphill walk to the top of the old town. We did a tuk tuk tour and highly recommend doing that as it's a quick, cheap, and private way to get the highlights. You can then go back to the places that were most interesting and spend more time there. We had the driver drop us off at the top of Porto and slowly meandered down back to the Airbnb which is a great way to see the city.
The host was easy to communicate with, met us even at 11 PM, and provided us with recommendations. We were surprised to see a washing machine in the airbnb which was a pleasant surprise after traveling for 2+ weeks prior. The loft aspect of the unit makes it so unique. The views are amazing and the location is unbeatable. Note: if you're driving, there is a parking garage about 3 minutes away - they only take cash so pay before you leave. We caused a big pile up because we thought you paid via card when you leave!
Lastly, I recommend having a drink before dinner at the Yeatman Hotel - the views of Porto are unreal and it's one of the coolest hotels I've seen. It's a nice semi-cheap way to experience the views of Porto.