Mario's place was exactly what my fiancé and I wanted for our stay in Porto. It was small but cozy and had everything we needed, plus it was clean, the bed was very comfortable, and the view was stunning. It was on the 4th floor but it wasn't an issue, just something to be aware of and prepared for. Mario was very responsive and easy to get a hold of. Check in was super easy! We definitely recommend staying at Mario's!