These are the best brand of flip flops I have ever owned. And my 4 year old has them also as they don't hurt into between her toes.
They are flip flops, they are not ergonomic and they are for a 4 year old. They work and they look nice and hold up well.
My 5 yr old daughter lives in these - easy on and off, but seem to stick well to her feet (some flip flops fly off too easily). She even runs easily in these.
The title sums up the exact feelings for this product. I bought it for my mother last year and she loved it.