If you liked the first three seasons, you will love this one. Even more cartoonish than S3, it is the ultimate crossover between a kid saturday's cartoon and a teenage Bat-series.
The plots are very strong. The creation of Harley Quinn, the introduction of Robin and the rare appearance of Riddler are worth the detour. The dialogues are quite cerebral when compared to the overall Bat-paclage. The impossible physical [rpwess performed by the BAT-Crew are somewhat annoying. The quadruple no-hand somersaults are taking this show into the cartoon stratosphere and are killing any attempt to make these episodes sbeleivable... but who cares. The 12 years old look given to Robin and Batgirl (very Teen Titans) will be disturbing tosome, but you b=get used to it. Alfred takes a back step to other charathers on this one. Catwoman is also rarely seen.
Tere are some memorable moments in this boxset. Villains siding with the police to defeat aliens was a fabulous stunt and the riddles of the Riddler were straight out of Frank Goshin mouth. WOW.... THe Toxine episode had the best punch of the whole 5 seasones serie.
A bit pricey ($25), but I recommend it very much.