Had my 13 in the dealership a few weeks ago for a check engine light. They never even acknowledged that the catch can was there (and it's red, so they could see it). Like Judd said, it would be very hard for them to claim a device designed to keep the intake system cleaner caused a failure.
I have the BT can and really like the look. Went with them because I could order custom color. Fits in nicely with the color scheme under the hood. It was one of the first mods I did.