To Flat or Not to Flat?

So I recently picked up three pairs of flats. Two are from the J. Crew Factory (the pink and green ones - I think the style is Anya?), and the blue one is the Cece from J. Crew. After wearing both styles, I have found that the factory one is much, much more comfortable. Who would have thought? Anyway, they were all pretty inexpensive, and I hope to get a good deal of use out of them.
(What is that in the far left shoe? Well, like many people, I have one leg that is about 1/4 inch longer than the other. It didn't bother me until I hit 40, but ever since then, I have worn a slight lift in my left shoe.)