Ha! We had a friend that was the same as your sister in law! There wouldn't be any pleasing him! We stayed at a brand new resort in Mexico some years back. Top notch everything,and wouldn't you know he would find things wrong with even that! I suppose if there wasn't water I would complain. And as to staying in the same place as someone else and having a different experience did happen. The couple in the room next to us didn't have enough water pressure to shower. No really! They invited us in to see! Soon come