Yup, I bought the Mias, and love them (have only worn them once so far, though, since the weather has been pretty nasty in the past few weeks.) They are very comfortable, and they run true to size. My feet are very uncompliated, though. (I'm a regular 9 with no special issues).
The color is probably more true to the Endless image. They are a different yellow than the Anne Klein ones. I had ordered them both to try on, and while I loved the Anne Klein ones (and liked their color a bit more), I found them a little more formal, and in the end decided to go with the more casual look of the Mia. I think I will get more wear out of them in the summer; the AK shoes seemed a little more spring-like and I couldn't see them as well with dresses and skirts as the Mia ones.
So yes, the Mia yellow is a bit more subdued, but I think it's wonderful color, very warm. More sunny/wheat, while the AK ones are more mustard-y. Both great, just different. I wore the Mias with dark blue jeans, red cami, and black little jacket, which was a good combination. And I look forward to wearing them with the blue shirt dress
Hope this helps...