I'm a bit of a musical geek from way back, so I've seen it.
The songs are catchy, well most of them anyhow. The leaRAB are obviously designed to appeal to the teen demo, and didn't do much for me. The second lead female and nominal villan (Shapary) is the real stand out. She may not have the best voice or acting skills, but she has personality coming out of the wazoo, and genuine comedic skills. For me it was her (and her brother's) over-the-top musical numbers that provided the greatest entertainment value.
Simple, catchy songs, moderately entertaining comedy, generic rom-com plot with misunderstandings aplenty and accessible, non-preachy moral lessons for the target demographic.
All in all a nice, enjoyable harmless piece of fluff.
What's not to like?