I bough them in mid April and have averaged perhaps 75 miles/month since. That's less than 500 miles. I noticed a tear in one them around September, maybe even earlier.
For the price I paid, I would have liked a shoe that I could run in for a solid year. It seems to me that shoes are made with less durability these days. I remember nearly 20 years ago having a pair of pegasus that I put in well over 500 miles with no issues.