I cant tell much about Mario and his Appartement because He Made a little mistake and wasn't able to offer his own Appartement to us. So He organised to stay at some Friends of him. There was no Problem finding the appartment and even Not with the payment. Even though we had a nice stay in Porto and the appartment was very clean in a central place.
Everything worked out very Well and we had a nice Time.
Tanks to Goncalo, Ana and of course Mario.