It looks good as it is, but the background looks too realistic in contrast to the character. The wings look jagged. The grass could be darker as well.

It's a nice concept, but the different elements don't blend together very well. The grass really looks kind of bland and generic; there's no problem using stock brushes for grass as long as you use the proper mix of colors and layering. The towers in the background look to solid, bright, and real compared to the rest of the wall. you might want to consider toning them down a bit, adding some atmospheric effects to push them farther into the background. As it is, they look really awkward and low quality. The sky looks nice overall, though you might want to change them up a bit (greater variation on color, size, angle, etc). The character looks out of place in all this, you need to go back and try to blend everything together in a more believable manner.

Your title is very appropriate for your wall. Your background is awesomely clear and the colors are bright and clear as well. I love the butterfly effects you added and the shimmer elements around the character. Excellent wall!

Clearly defined, bright colours - this certainly is a nice clear scenic wall. Composition is pretty good, it was sort of hard to believe this was 1600 x 1280 because it didn't have that sort of empty feel some high-resolution walls have. The sky itself looks particularly attractive.. I don't know why. It must be that shade of blue.. feels really open.
I say pretty good composition because I find the bit of tree and the bright cloud a little weird. I think you could have gotten away without the bit of tree hanging in from the left edge and the cloud looks odd because the sun is right behind it, yet you see the brightness. I'd have had the sun peeking over from the top of a cloudbank.
Some elements just don't feel crisp.. like they got scaled up too much or weren't from high-quality sources. Like the lineart on the girl and outlines of the butterflies, or those magical brush effects. Kind of a shame really D: