Thickness and warmth: It is lined and slightly thicker than I expected, but still perfect for fall and spring temps as well as in winter. This morning it was 17°F in Northern CO (but no wind) and I was perfectly warm walking my dog for 30 minutes with this peacoat over a thin sweater and a turtleneck.
Fit - my measurements are 45-33-47.5 and the Large/16 is a perfect fit. It looks well tailored and is slimming. The little bit of stretch in the fabric allows for a slim, tailored fit but also a little give for movement and comfort.
Other features: The pockets are big enough and placed well so that my cell phone doesn't seem in danger of falling out and doesn't interfere with the fit or being able to bend for sitting.
I love the embellishments - I've spent too many years wearing men's clothes and am thrilled to have this quality, tailored fit, feminine peacoat!