I did that several years ago (won't name the trainer, who is very good, just BORING to listen to for any length of time). Took me forever to get through the DVDs (kept drifting off :).
I did get useful info from them, just took quite awhile to get there!
Would I spend the $ again on these, nope. Maybe I'll try watching them again, maybe I'll "soak-up" some info I didn't back then.....ya never know.