Do Karhu shoes wear out quickly?

Looking at various runner's blogs is a great way to find out information about a product. Reviews appear to be mixed, some found more wear in tear in particular areas (Wordpress.com/2012/07/05/karhu-review-just-for-you/">http://allensroadtoboston.Wordpress.com/2012/07/05/karhu-review-just-for-you/ while others had no issues with their purchase other than a little less bells and whistles (http://www.runnerstechreview.com/2011/04/karhu-fast-2-fulcrum-two-firm-opinions.html).