One thing I like about my Sony Fossil is that not only can you program across discs (the instructions for that have always defeated me), but you can also do your own quick-and-dirty mish-mosh programs each workout by loading all the discs you want into the tray, cycling through them and "marking" the point on each disc where you want it to start and just hitting the "play" button when you've lined them all up. (Weirdly enough, the DVD player "remembers" where you marked each disc for about 5 to 7 days.) This is especially helpful when you want a disc to start in the middle (or wherever) of a chapter as opposed to the beginning of the chapter.
I must confess I am as big a fossil as my DVD player, so what I've recited above is probably a standard feature on ALL players. Please bear with me. However, I will say I have never had a problem with my Cathe DVD's in this player, and my player is ONLY used for my workouts. (Sorry, DH.)
And just in passing - I'm having too good a time watching the Vikings embarrass themselves OFF the playing field with that whole (IMHO grossly overblown but highly entertaining) Love Boat thing to think about their games. (I'm not a pro sports fan, obviously.)
A-Jock