And if much of it is as recycled as the fan review Gothick shared claims, perhaps all but the completest fans may even give it a pass.
I bought the DVD as a birthday gift for a friend who's into DS (though nowhere near as much as we are) and I'm going to wait until I see it for myself by borrowing his copy before I buy it for myself...
All that being said, though, I do see where on Amazon it's currently ranked
#214 in Movies & TV
#1 in Special Interests (Movies & TV)
#2 in Documentary (Movies & TV)
and those seem like pretty good numbers.