This is review for people who's having doubts about this place.
This is your apartment! I've stayed here for a long term - 1 month precisely. The whole stay was amazing.
Bedroom comfortable and cozy. Kitchen has all necessary things. Bathroom clean and tidy (one of the most nice showers I've ever had in Porto renting experience)
Flat nice located.
About the experience with owner - AKA company that manage few apartments on "air b'n'b" on behalf of owners. These people are amazing. I booked another apartment after this one to stay - and both happened to be their's. So to do not wait for a 6 hours before check out and next check in date - they give me a key for a day in advance w/o any extra charge, so I can calmly move my stuff to next flat. They were extremely supportive all the time and helped with many requests and questions.
I had a lot experience with air b'n'b in different countries, but this is beyond my expectations. If you still have doubts - don't have.