Both my dad and I have a sheffield. I have used mine quite a bit, but nowhere near as hard as what my dad has put his through. Through the winter and most of the spring for three or so years, his sheffield gets used to cut the twine on hay bales. The knife is still going, although he did break the little tab for the blade release. I hate to say I liked a chinese made knife, but I have to put the sheffield as one of the best things that cost around $10. One neat trick I found with the knife is that when opening it one handed, instead of using the thumb stud, I put my thumb up where the blade exchanger lock pivots. It makes the knife much easier to open, although I guess you do increade the risk of cutting your thumb(that hasn't happened yet). Also I found you can close it one handed by pressing the lock release with your thumb and letting the blade holder close on you pointer finger, and then closing it the rest of the way. The only problem I have found with this method is that one might forget that this isn't something you should do with a regular lockback(I think I did that once)>