i use shrink a Cdvd2 togather CONSTANTLY.
i like shrink's compression results better, but i hate that you can't cut and still kep menus.
in clonedvd2 i do all of my removing of titles and trimming chapters in DVD+r DL mode and save to .ISO then i use shrink to shrink the whole thing to single layer size. then i burn the ISO with ImgBurn.
sounds crazy, i know, but i like my way. i get the best of all worlds. clonedvd's ability to do some reauthoring while preserving menus, dvd shrink's deep analysis feature, and ImgBurn was designed for burning images so why not!