I bought these about a year ago for two-step and swing dancing and they are by far the most comfortable dance shoes (not to mention the most comfortable heels) I've ever worn!  The heel is high enough to keep me balanced and low enough that I can (and do) dance for hours without any pain.  I wear a 9 and the 9 fits true to size AND molds to your foot after a few wearings.  Also I don't have high arches, but the arch support is part of what makes them so comfy.  And as other reviewers have mentioned, wearing them on the street will kill the soles quickly - mine have made a few trips from the car to the dance hall, but I mostly only wear them inside and the soles are still in decent social dancing (but not ballroom) shape.  All in all a great shoe!