This place is very clean and conveniently located near most of the main sights of the city - within walking distance to the main cathedral, the São Bento Train Station as well as the wine tasting area of the riverside.
It can be a bit noisy in the evenings with traffic and occasionally loud tourists in the streets, but given the very central location we have no complaints whatsoever.
The hosts were very responsive and friendly, offering us excellent suggestions of restaurants nearby. Essential items like towels, blankets and shower gel were all generously supplied. We even got some free beer and orange juice prepared for us in the bridge.
I would highly recommend this place to future travellers visiting Porto.