I had my shoes sent 2 day shipping speed, they arrived on time!  Was so pleased and the shipping fee was amazing for 2 day delivery.  I will be ordering from this company again!!!  I recently had back surgery and have fibromyalgia.  The bones in my feet become so painful it is hard to walk for very long, if I can walk at all.  And of course if I am on my feet for two long my back is in severe pain.  The reason I purchased these was because I have to walk on a treadmill everyday, 2x a day for my post-op therapy.  My treadmill has shock absorption, but not enough for what I am going through.  I read a lot of great reviews on these and I now know why everybody loves them!  The instant I put them on I knew these were going to be great.  The heal of the shoe cups my heal perfectly giving me extra stability and the tube base provides so much comfort because it absorbs the shock from walking/standing on our hardwood floors and my treadmill.  I love the bright colors they have to, very fun!  I am 41 and have always had black or white shoes with some various colors on them, boring basically.  I will definitely order more in different colors!  Someone had written previously that you can go to the kswiss website and print of a shoe sizing chart.  I did simply because a few people thought they ran small.  Wrong, the fit absolutely perfectly and are the same size as all of my other tennis shoes.  I am also planning on ordering the Ultra tubes now.  They have even more cushioning, so I am sure they will be even better for being on my treadmill.  And I will definitely be order these for my son because of the stability alone.  He has weak/"rolling" ankles, I know these will be much better than the New Balance shoes the doc's have recommended over the past 12 years. I highly recommend these and cannot say enough good things about them.