Most AccuStats DVDs are indexed to the start of each rack, which is fine for banks or 9-ball (haven't seen any straight pool or one pocket DVD's yet). The ring game was an (unfortunate) exception, there being only an index half way through the disk. If you don't watch the whole DVD in one sitting, the lack of index points makes it hard to get back to where you left off, which is somewhat annoying.
I agree that the DVD picture quality is much better than VHS. I will be ordering DVDs all the time in the future.