^ shoes wear out really fast. Don't quote me but on pavement they are only good for about 300 miles or so but it depends on running style and build.
You need two pairs. Pair 1 for running , pair 2 as a standard.
Run with pair 1 for a week then switch to running pair 2 for one run then switch back. When you notice a difference between 1 & 2 buy a new pair. Throw away the old pair 1 or use them for the Hash! The old pair 2 standard become the running pair 1 and the brand new shoes now become the wear std. pair 2.