Negative:
The beginning was definitely promising...but for some reason it just went downhill for me. The beginning has tints of comedy and light-hearted romance, but then, on later chapters, it started to get darker, and I did not like the atmosphere. Too much angst and melodrama. It seems as if Ann was constantly encountering downfall after downfall...that it got boring. Also, I agree with wintermelon that Fuji's character was wasted, he looked good with Ann!=________=.
Positive:
A plus for its realism on the characters and plot. Also, it may look like a typical shoujo, but there's definitely something more to it than just a girl struck by unfortunate times, but gets through it, knacks a boy while she's at it, the end.
Art: I really liked the art, like Ai no Koe, to me the art is sketchy, but nice to look at. I've liked her drawings ever since Forbidden Dance x33
Overall, it's in between. Not too bad, not good either. Give it a try, though. Nothing to lose anyway.
That's my opinion on Sand Chronicles.