I came out here and read every rating, starting at the bottom, but became more encouraged as I read higher ratings.  I received my Shape-Ups shoes.  I ordered .5 larger.  I'VE WATCHED THE DVD like a good girl, I'VE DONE THE FITNESS EXERCISES provided on the DVD like a Good Girl.  To my great surprise...I've worked my butt muscles, my leg muscles, and stand taller and straigher, they make me feel GREAT!!!  I could wear these all day.  I didn't feel any BURNING in my legs at all...  Working the muscles I did get the healthy "Pings" from a good healthy stretches, but nothing like the one feedback person mentioned.  If one is just starting out do a little everyday.  It doesn't take long at all to find your CENTER.  Remember keeping your awareness of your CENTER will prevent the imbalance some talked about. I haven't felt that way at all.  They fit well and are so comfortable.  Ordering .5 larger makes the walking so much better for my feet.  I'd never go a whole size larger, let's be real.  I'm a slightly overweight person who needs to get back on track walking and eating right.  These will give me the boost I need without having to "go to a gym".  I will buy another pair soon, and my husband wants a pair too.  Truly revolutionary shoes!  Thank-You Sketchers!!!