Lucky if I get 6 months out of any pair of work boots. Was working for a large company quite a few years back and we were issued new boots every 6 months. There were plenty of lazy b'stards who couldn't wear out a pair in 2 years, so I was buying them up at half retail. Got 6 pair that the sole just disintegrated, you could literally follow my footsteps and see where I had been on site.
Always look on the bright side. Got 6 spare pair of laces, and the boots make brilliant planters for cacti...