First time purchasing a running shoe without trying them on.  Even shoes I purchase over the internet have had a face to face meeting at the local running stores.  I wish I would have tried the Runtones on first. For some reason the right shoe hits right below my big toe and is pretty uncomfortable. This problem will probably be unique to my feet, push off, and landing so don't let it discourage you, but do try it on first. As for extra toning compared to my usual running shoes, I have not noticed any.