If you're intent on comparing this with the earlier episodes you're likely to find faults with it (personally, I feel that Scarecrow, Joker and a few others actually benefit from their redesigns) but taken on its own merits it's a fantastic set of episodes and a worthy last run to round out the legacy of Batman: The Animated Series before moving onto Batman Beyond and Justice League.
There are points of contention- I can't abide the replacement of that gorgeous Batmobile from the early 90s and the episodes 'Critters' and 'Love is a Croc' are abysmal- but all in, the series keeps much of what made the early seasons so successful: the trademark 'dark deco', sharp scripts, solid storylines second-to-none acting. What it adds is a fresh animation style that's so much more fluid that the older shows, which sees an extraordinary increase in the kind of cartoon violence that really makes you flinch. Everything else you loved about the old shows is still there- the red skies, the classy orchestral scores and a fair few Paul Dini classics. Despite the addition of Tim Drake's Robin and Batgirl to the regular lineup, The New Batman Adventures present a paradoxically more isolated version of the world's greatest detective, bolstered by the rift between he and erstwhile Robin, Nightwing.
Standout episodes include most obviously 'Mad Love', the long-overdue Harley Quinn origin story, 'Holiday Knights', an amusing festive anthology and 'Joker's Millions', naturally. Most entertaining is 'Legends Of The Dark Knight', another three-segment episode which presents animated versions of the 50s style Batman comics, and a segment from The Dark Knight Returns that's just begging for the full-length treatment.
The set is packaged in accordance with the other Region 1 sets but clashes with the Region 2 versions. Extras include a few commentaries and a disposable feature aimed at kids.