These shoes are great.  Even though they are very lightweight, they provide plenty of cushioning and support.  I have very high arches, and it is rare for me to find a shoe that is as comfortable as these are.  I use them primarily for high-intensity classes at the gym, and I swear the performance of these shoes improves the longer I wear them.  I will definitely continue to buy these as long as Skechers makes them.  It doesn't hurt either that they come in so many fun color combinations.  As for sizing, I ordered my usual 7.5 and they fit perfectly.  Highly recommend.