It's more than double, but at .60 a disk, you save on a second sleeve, you don't have to get up to change the disk and you save on storage space... and we're only talking about pennies here. On a large movie, IF you're not using HDD storage for your movies already, one disk is worth the extra pennies for all the other benefits, the chief one being the interruption in the movie -- that NO ONE wants.

Everyone knows these things... I was just surprised that "Ben" seemed the price difference (that everyone already knew) was worth making the point.

Saving the interruption in the middle of a movie is worth paying .35 in most people's opinion, I think.