You don't need the DVD from E if you are going to get this effect. The gimmick isn't THAT hard to figure out, and about 20 minutes in front of a mirror and you'll have this working like a pro. The instructions that come with the effect are well written and do a good job explaining it. Even if they forget to send you the instructions this effect is still pretty strait forward enough to figure out on your own. As an additional point, you should be coming up with your presentation anyways, so the DVD is for either an extreme beginner, someone with money to burn, or a collector.
As for the effect, this is hands down one of my most favorite levitations out there period.