I ordered my first air of Propet a few years ago after tiring of the typical shoe store offerings, big box stores, and factory outlets.  I had never heard of Propet but I figured what the heck, the warranty sounded great.  They lived up to the warranty and beyond.  I wore the shoes nearly everyday for more than two years and I can still wear them today.  I pronate and wear shoes out in a hurry but usually only on one side.  The Propet has worn evenly and remains a sturdy support.  I know I will love my second pair as much as the first!