I tried for three weeks to get used to walking in these shoes and get up to the speed and distance that I walk in normal walking shoes, and I gave up.  They are not comfortable, they are clunky.  I have blisters on my ankles where the padding rubbed.  I would not wear these outside on the streets, I only used them on the treadmill.  I stopped walking because wearing these shoes made me dread hitting the treadmill.  I've had them too long now to be able to return them for a credit, so I'll donate them to Goodwill.  Maybe someone else will have better luck with them.  Last week I bought some Asics Gel 2150 shoes and I love, love, love them.  I am walking again, and loving every minute.  Special toning shoes don't work if you don't exercise, so I'm better off with the Asics.