If you have a sunroof, there was problem with some of the sunroof drains, in the vehicles made before March I believe, that maybe what caused the stains to the headliner/floor, you had spillover from the drains. I think one person on this forum had their's fixed for that.
I picked mine up March 31 and knock on wood, have not had a single problem to speak of. It did ship without the the Homelink sunvisor, but the dealership took care of that as quickly as they could, it had to be ordered. All other options were installed correctly.
Alyssia