The download process for Tricks works the same way - you receive an email with a secure link and password, with which you can download the video. Once the vid is downloaded, you can watch it on your iPod forever, transfer it to another computer, burn it, and the like - without any restrictions.
Plus, they're playable on Mac's, as well as on PC's, which personally is great.
And you don't have to install a separate #$%^&*! bloatware viewer of some sort and #$%^&*! around with DRMs that end up forcing you to buy the DVD anyway because your videos are only watchable on a laptop that is two laptops in the past.
Not that I have any personal experience with this. Or that I am referring to any particular company that folks here may or may not have experience with.