I am a big fan. My usual size fit perfectly. It's very flattering and cute-the sleeves are beautiful and don't overwhelm the top. I don't know if I would really call it a sweater-more of a warm shirt. The length is good-not too long but long enough. My only mild criticism is that it's not that soft. I liked it so much I immediately ordered the Maude dress.
I'm 5'7", 120 lb, and I ordered the x-small.