I'm about to buy the S.A.V.E. edition of Welcome to the NHK on Amazon, and I noticed how much cheaper these editions are compared to the original versions listed. This seems too good to be true, even if it is specific to anime licensed by FUNimation. Are these editions missing anything other versions may have by default (e.g. commentary tracks, 'making of' features, bloopers)? If they do, then I just plan on buying a couple volumes of either OLDBOY or 20th Century Boys.