""Value" - I wasn't sure about getting this dress at first...If you're not sure about this dress too, my opinion is that $100 is too much for it. I bought it because I got an additional 20% off plus had some cash left on an old gift card. In terms of quality, this dress is average....The chiffon part holds up well. But, be careful not to snag any part of this dress on anything! I also keep thinking that they should have used a satin ribbon for the back to make it even a more romantic Spring style - instead of the cheap grossgrain ribbon or whatever they used...it curls or "wrinkles" too easily.
"Sizing" - I'm 5'2" and about 120lbs. The XS fit me well but was a bit big on me width-wise. XS was perfect in length for me. The S was too long for me and made me look quite frumpy. Even with the XS, the sweater part became quite loose throughout the day.
"Underneath" - I highly recommend wearing a long tank/tights/slip under this sweater-dress, regardless of what color you get it in...It's definitely sheer.
Overall I think this sweater-dress is cute and casual. Sort of a nice brunch or casual work-day sort of attire...depending on how you style it of course."