If I may, I'd like to brag about my tennis shoe situation because I have saved over $400. If you don't mind taking the time to do this, So...I'm on my 4th free pair of nike air tennis shoes. What I simply do is send them back every six months because I actually wear them out so fast. The key is I actually put a hole through them I wear them out so fast. Also there is a 2 year warrenty for other things.
Bottom line, Nike is great with returns, replacments and honoring warrenty's. I can help anyone out if they have questions. I'll post the letter I send them everytime and better yet, I'll post the number to the DIRECT SUPERVISOR...(I SPENT 1 HOUR ON HOLD GETTING THIS NUMBER!!!!!)