I love these shoes.  I am a jogger (not a runner and NOT light on my feet at all).  I have to have shoes that offer a lot of stabilization and these absolutely do.  I feel very stable and confident moving in these shoes.  There is a lot of shock absorbtion, which I like.  I don't necessarily have bad knees, but I do feel less stress on my knees when running in these shoes.  They do not feel heavy on your feet at all. I will order these again.  I may order a half size bigger next time.  I normally wear a 9 and that's what I ordered.  My toe is just a little closer to the end than I prefer, but not enough to make my toes sore when I run or anything.  Again, I LOVE these shoes.