I have both One click dvd copy Pro and clone dvd 2 along with anydvd. I am partial to both, Each one has its own problems however. One click pro cannot split a dvd 9 into 2 dvd 5's, however it does let you compress each title as much as you want and take out some of the anoyances like advertisements. It makes great quality copies just like the the regular one click.
Clone dvd allows you to split 1 dvd 9 into 2 dvd 5's but its quality is a little shaky sometimes especially on animated movies, you tend to get really rough lines sometimes. However clone dvd 2 sucks with multi angled movies ((((So be Forewarned))). This is the reason i actually went to I click Pro in the first place. For me Having both One click pro and clone dvd 2 is perfect. But dont take my word for it. Both have a trial version. Go and download each and see if you like them.