I know people who wore those back in the day. If you plan on walking whilst wearing them get some sorbothane insoles; the sole has a negligible shock-absorbing capacity. Better for assault courses than Lowas; bigger heel block.
I found that the soles on mine came apart after about a year. The 'foam' inner part came away from the rubber and it ended up flapping around under my foot.... On an insertion tab... In Brecon.... soon to be followed by the other! I ended up having to use black nasty and duct-tape to hold the heels on.
It looks like while going into the kneeling my back pouches, with my bergan resting on them, pealed the two layers part.
I loved the boots though. However, my new altbergs are lighter and nicer... but far to hot!