This is the 1st pair of Ryka's shoes I've purchased and definately won't be the last.
These have fantastic grip on the ball for fitball, but are equally great for aerobics and zumba classes.
They are lightweight, plus they look great.
I would've gone 5/5 stars except they are a little wide across the front of my foot, meaning I have less stability, otherwise they're perfect for gym classes.
(They're not a running shoe)