I have tried a lot of apps (most) from the app store and the older version of Reflow is still my pick for notation on the go. The only thing I wish it had was realtime recording. I use Symphony Pro for that and Multitrack studio for iPad and Mac. But no iPod/iPhone. It does have a score editor, but as I said Reflow has it for me as it is on iPad,iPod/iPhone and Mac there is a new version but I prefer the old version. Well that's my review.
Tried to upload an image but no luck.