This dress is true to size and fits beautifully on curves! The colors of the Solstice print are more subdued than in the photos -- it's more like a melted popsicle, definitely softer than the neons+pastels in the product photos. The fabric pattern also varies. However, it's still gorgeous.
I'm a 14/16 and XXL was great. The zipper is a bit difficult to do yourself, but not impossible. The fabric seems to warp easily if you happen to adjust it, so be careful with how you handle it. It's very soft to the touch and feels well-made.