I have only used this in extreme circumstances and only on blades that require serious reprofiling.
I had a nice W&B that was 8/8 at the toe and 5/8 at the heel, which is fine for a chopper, but this was a holl ground square point and it just wasn't going to hone right. Now it took some time to get it right but 'breadknifing'(this is not a term I like for the process!) really made this blade a great shaver. Now I have a perfectly proportioned 5/8 hollowground blade.