Hi Dan, I have been using it to slice some caedbcard boxes for recycling and opening plastic packaging, so far the edge held up quite well. It also bit me when I was sharpening it and put a nice little slice into my finger haha. (My own stupidity)
I have a pretty long history of being attacked by knives too. I almost lost a finger a few years ago when reshaping the edge on a folder. I adjusted the position in the clamp/vise thingy and the "lock" let go. My finger was in the way. Not pretty. I'm pretty clutzy though... i guess knife making may not have been a wise choice for me.