Had a recent awesome experience with Diono. Bought a Radian XT two months ago for a trip we were taking. Took the trip at the end of Oct - installed FF fantastically in the plane. Installed well with UAS RF in center of rental 2011 Impala. When we uninstalled (at 4am in the morning) at the rental place while hurrying to our flight, noted the boot tips where both damaged. Emailed Diono when we got back...and a new RF boot just arrived in the mail less than two weeks later, no questions asked, no hassles. I've never contacted a carseat manufacturer before about an issue, so not sure if this kind of response is standard, but we're thrilled with it.