It was my own fault. I only had a good look at Mizuno's website AFTER getting 2 pairs of shoes, one of which are Nexus Wave somethings- I think 5. These are honestly as good a fit as I've ever had in footwear, ludicrously comfortable and very light, but since I underpronate and these are "moderate" overpronate correctors, there is no way I can wear them. I didn't notice it in the shop and the ladies that served me were in no way trained to give this information, instead simply trying every pair they could to get something in my size. They were actually very nice. I spent so long searching for "real" running shoes without doing 20 mins online research. It didn't occur to me that a product of this nature would simply be there to ruin the knees of any unsuspecting person! Since getting them I've worn them on one night out and around the house for a couple of nights. They have a slope of something like 15 degrees, so that my feet are constantly tilted with the outside of them lower than the inside. I notice that without even running, simply walking round the house, there is increased pressure on my knees at an un-natural angle which makes it more difficult to lock them. When wearing them I assume a very slightly knock-kneed position, just standing waiting for the kettle to boil and after a couple of days of this I decided it just wasn't right. After my night out I was conscious of my knees in a way I never have been before, as if I'd been to yoga or something. I did get one very good pair of Mizunos, their basic table-tennis shoes, which are very comfortable and totally conventional. Obviously there is no way I'd going to risk my health over a pair sneakers; there is no question I'll continue to wear them, but the thing is I can't just leave them out to be picked up by a person in need, as I risk passing the problem to them! I'm gutted. I wonder if anyone has experience of using overpronate-correctors to correct overpronation? Is this another bad idea or does it have it's place?