I don't like it as much as the first to be honest.
The first was a continuation on season three, easy to understand and the first time we ever saw the winx in that animation, it was a big, and special thing to me personally when it came out, not to mention every other winx fan most probably. The second, in my opinion...is just topsy-turvy :/ your thinking 'ok, this is right after first movie' then you see believix but no Roxy 'ah, so its after season 4 then.' Then Nabu appears and suddenly it just goes......WHAAAA??? o.O
As much as I love the storyline of it, the magical aspects of it just wasn't enough for me. My favourite parts of the first movie were the parts of them in their enchantix, either kicking-butt, or just relaxing with the pixies. I loved it, they showed kinda that the transformations aren't just there to help them fight, its their magical identity in a way. That to me, took away the big argument about winx being a copy of other shows with transformations. But because of the story about the tree of life, or whatever it was, there was sadly no general believix scenes in there, apart from my favourite, when the girls are flying around the flying boat.
Plus the CGI- with enchantix, their wings seemed to be moving, almost by themselves, as if they weren't these hard straight things that stayed still unless they flew, but some soft, delicate things, that swayed beautifully, and they didn't seemed to be attached to them which gave a big essence that their wings aren't their source of flight, but just a projection of their magical energy. In this film, the swaying was barely seen, there was barely wing movement at all, which disappointed me
Overall, I did love it, I was just slightly dissapointed with a few things.