I recently upgraded my Wave Inspire 7's to these 9's and they are fantastic shoes. My old 7's are still in fantastic shape and I wore them for over 1000 miles of running and often wore them as my daily shoe. I have already put about 100 miles on the 9's and absolutely love them as much as my 7's. My only concern is that they may not be as well constructed as the 7's, but only time will tell here.