I purchased these boots about 2 1/2 years ago and have been wearing them close to 5 days a week since then. I kept them clean and treated with Sno-Seal a few times a year and they have lasted quite a long time.
Aside from the normal practice of replacing the insole every 6 months, I'm looking for a new pair of boots because these have worn through the liner at the back of the heel and on the inside at the steel toe causing holes in pretty much every pair of socks I have. Also, the lower part of the sole has also started to separate from the upper on both boots. I will probably buy another pair since they have been the longest lasting work boots I've owned. If you try them on in a store to ensure a proper fit before you buy them and keep them clean and treated, I believe these boots would last the average person many years.