I cannot understand the attitude of collectors that call this set "double-dipping". After all,you don't have to buy it,do you? No-one is twisting any collectors arm.
If you are a non-collector that just wants a "best of" series then sets like this are fine.
For example,there maybe fans that don't want to buy the largely mediocre first season of Star Trek:The Next Generation,but do want the Peabody Award winning episode "The Big Goodbye" from that season which is on this set. If that is the case,then this set is ideal for them.
In fact,one of the things that has been neglected by studios is that "best of" sets would be a good idea for fans of TV shows that don't want all of the episodes. I think that would be a very good thing.
"Best of" sets do have their place for fans that don't want to waste money on bad Trek episodes like "The Way To Eden,Angel One,Q-Less,Bride Of Chaotica" and other stinkers from the various Star Trek shows. I could make a bigger list of the bad episodes,but this review would take up too many pages.
Wouldn't it be nice if fans could buy the best episodes on any television series on one DVD set? I think that would be a great idea that would be embraced by some buyers.
This set also has a non-Trek documentary narrated by Patrick Stewart called "From Here To Infinity" which makes a nice extra.