We understand the need for time to clean, but having guest stand outside a cleaned and ready apartment until exactly the time of check-in is a bit authoritarian and silly. I also didn't like the requirement we have a smartphone with data in order to check-in, as I don't use my smartphone for anything but photos while on vacation, and had to purchase a data plan for Europe. So, we were dripping wet and unhappy by the time we got inside. That said, the apartment was clean and comfortable with a very nice view and in a convenient area. Despite the difficulties with check-in, I will likely book directly with Rest4Rent my next time in Lisbon, as we've been informed by VRBO we should simply deal directly with the rental properties on our own.