I must say i completely disagree with negative comments about this film. The plot is simple which accomodates not only Little Mermaid fans, but also those new to the series and friendly for both adults and children.
As a fan of the Little Mermaid and its sequal, i was expecting a lot less from this prequal, much like other 'straight to dvd' titles, but i could not have been proved wrong any more than i was.
Admittedly, there are not as many musical numbers as the original, but i think that works well within the plot (music being forbidden in Atlantica) yet still provides a few fun numbers with Athena's song being one of my favourites.
It was great to see how Disney veered away from the 'menacing villian' type character such as Ursula and Morgana and instead provided a quite comical character in Marina Del Ray.
The animation is top-notch; something evidently lacking in the sequal. The original will always be a classic through its memorable music pieces and animation, however i feel this prequal really gives depth to the characters and for any Little Mermaid fan, this is a must have!