The accommodation is well situated, right in the heart of Porto. The landlord was quite friendly and gave us some tips for eating out.
However, it smelled like the bathroom was mouldy and there had been a try to get rid of it by using some cleaning products and repainting the room. However, this 'treatment' clearly didn't help as the result of it was a horrible smell of mould and some chemicals plus the paint running on the walls. Also, there is not so much sunlight in the flat (it's on the basement level) and after spending a night there we could feel that our stuff were a bit damp.
We appreciate the advantages of the accommodation = the location but we would recommend the owner to invest more money in the apartment (getting rid of the mould), otherwise guests will realize that with the mouldy smell and no sun light, staying for 1-2 nights is more than enough.