The flat is awesome - just as the pictures show. The living room is v spacious, as is the bathroom. There is plenty of storage space, so enough room for everybody.
V. good contact with the host - it was easy to arrange the keys pickup.
The flat is in the centre of Porto, so I highly recommend to those who go there for sightseeing.
The only thing that could be improved are the frames of the single beds, the mattress holders are not very stable and my friend fell down when she sat on the bed for the first time, later we were careful and no further accidents occured :)