Well it's hard to really be sure because she's not standing square but I'll give it a try and someone can correct me if I am wrong. (This is from what I've learned from the conformation clinic in the magazine HOrse & Rider so I'm no expert).
Like Lobelia said the neck seems a tiny bit long. But usually the distance from the poll to the beginning of the withers is twice as long as the "under neck" part, and it seems to be good there, although I don't know if the neck is to long if compared to the proportions of the rest of the body.
Not sure, but the neck seems to tie high into the chest which is good because he won't be so heavy on the front end... Overall she seems well muscled and fit looking... and that's all my poor expertize can notice for now. ;)
A ride a day keeps the worries away!