I run ~70 miles a week on this shoe, and it holds up great, pretty good price too,
personally ill run about 300-400 miles on a pair before i get a new pair, but thats just cause i run on the safe side, i know friends of mine who put 500+ easy on a pair before  buying a new pair.  on my XC team, asics is the most popular brand shoe and this is one of the most popular shoes,
A++