The location of the flat is great, few minutes walk to the metro station that takes you everywhere in Porto. Pedro kindly offered us an earlier check in since our flight arrived in the morning. He showed us how to get around and places to go and we've been to all of them! Thank you Pedro!
There is a cafe below the building (Cafe Sweet) which is very nice and very cheap! We had our breakfasts there and lunch and the owner went an extra mile to cater for three people with different allergies/food intolerance. I strongly recommend having a meal there, it's simple homemade typical Portuguese food!!
There were a few let downs regarding the flat but they can be quickly fixed: the shower curtain kept collapsing to the point we gave up trying to fit back; without the curtain the bathroom was flooded but I guess you can live with that for a short stay (good shower though!). The kitchen is great but there was absolutely nothing to use for cooking as in a bit of sugar/salt/cooking oil/coffee or anything like that. I am just mentioning this because we mainly chose AirBnB to cook at least 1 meal (breakfast or dinner) due to food allergies and at the other places we've stayed there was always a kitchen with basic supplies to cook or a bit of coffee/sugar/tea, etc. If you are like us bear in mind you will need to buy everything which wouldn't be a problem if our stay wasn't so short!
I think the main problem was the sofa bed mattress - there's barely any padding and it is extremely uncomfortable. We are not fussy about mattresses when we travel but I have neck issues and that mattress was a killer. My partner has no issues at all with back pain/neck but after 2 nights in the mattress he was in quite a lot of a back pain. It was quite surprising to see him complaining about a mattress! I hope they change the mattress soon for a more pleasant stay. There few bits and bots that need maintenance but nothing major, more about the cosmetic side of the flat.
Having said that, the flat is really nice, lots of space upstairs and there's a nice rooftop where you can have a drink or have your breakfast ;)
Thanks for your help Pedro and I hope Joao works on improving this lovely place!