I was staying in Porto for a couple days with a friend and we saw this listing of a quaint little apartment on the outskirts of Porto for a really affordable price and took it. Upon getting there however we first noticed that the nearest bus stop was quite a whiles away meaning you have to walk through a bit a industrial area (which we would not be quite comfortable doing at night). Then we arrived at a deprecated looking apartment building, where we retrieved our room key (which to be fair was quite easy!) and entered the building finding a homeless person camped up in the lobby. Making our way through the completely desolate looking building we arrived at our room. It did look like in the pictures, however we understood why no pictures of the bathroom and kitchen were included, because they were quite old and dingy looking.
All in all, would not recommend for anyone travelling alone and I personally don't feel its cheap enough to deal with these circumstances.