I used to have the CED Star Wars and from what I remember of it, you're not missing much if you don't have them. I'll be surprised if you can view the discs in their entirety without the discs skipping like old vinyl LPs would. That's pretty much what killed off CED. Also I believe that TESB disc would be the time compressed version which they did with the early videodisc releases to fit the movie on one disc (EDIT: Like Spock said ).