There are so many good things to be said about this collar! First, it is precisely as cute as it looks in the pictures! The material and construction appear to be high quality. It isn't quite as stiff as other collars and has a looser fit (at least on me) -- these two things make the collar exceptionally comfortable! Unlike other collar designs, this does not have those little arm straps (at least, I use them as arm straps). This, again, adds to comfort however it means that if you're moving around a lot throughout the day and in a looser sweater, the collar is liable to start to shift. I haven't had any crazy shifting issues -- it's never gone sideways or anything particularly notable but there have been times when it just gets a little uneven. I should, however, mention that I put this collar through some pretty extreme circumstances -- working all day and then some and likely constantly shifted by my backpack.
Speaking of extreme circumstances -- makeup washes out of this collar remarkably easily. It sits lower on the neck so overall, you are less likely to have problems with makeup getting onto the collar. But I've managed to do it before (protip: apply makeup and then put the collar on). On the rare occasion it has happened, it's always come off like a charm with a little stain spray before being put in the wash. After months of wear, the collar has held up and looks as good as new!