For me here is i don't like it and it could be better.I'm chossing i don't like it because:
The name is not good ,i mean beyond believix it don't syits season 5 i guess.Better it was underwater powers or i don't know.
I don't really like the trailer it not good as the anothe rone.

I didn't like it. It looked cheap and very cheesy. Plus, the hell is up with this book? We already had one in the first season that was significant why do they need this one that rhymes and shit? It's not like the girls are that stupid that they can't figure out how to deal with problems on their own. Plus, they made the Trix seem pathetic; they got worried when Bloom appeared in her new transformation. What? Why should they be scared?! They're the witches!

Meh...it's okay. But can be better. Like, really? Beyond beleivix? What is that! But ATLEAST nick TRIED to not spoil to much. Like showing there transformation and stuff. And, the winxes outfits. There outfits are cute, but to childish. Like flora and her big cute pony tail, and Stella with her HOT outfit, and blooms tween look. I think the winx are 20 by now, almost an adult...right? And Stella, is an adult. But it's kinda okay. And, ofcoarse, what's with the TALKING BOOK!? Like really? And rhymes? It's really cheesy in my opinion. Like, Can one of the winx read it outloud? Without cheesy rhymes? And, the Trix. Like I am DONE with them! Like they appeared in 3 seasons, going for there 5th! The winx defeated Valtor and the wizards of the black circle, stronger then the Trix. But they just can't get them for some reason! And, I can't understand the harmonix and sirenix powers if they don't need them. Because, in season3, when Aisha got her enchantix, they had no problems using there powers underwater! I could go on, and on, and on, but i won't.

^^ I totally aagree with lovebaltor .It's cheap and very chessy,What the heck a speaking book.It's way weird.And their outfits are to chlidish.I mean the winx exept Stella are 20 years old and Stella is 21.