Good Cutters, but they have limitations.  Like any metal, cutting on rocks (like when stuff is on ground) will wreck them as rocks are sometimes harder than the metal (duh!).  The foam on the ends of the handles gradually over a year or two will fall apart/fall off, so don't expect them to last.  Yes, you can replace the cutting parts, but you might as well just buy a new one as the cost for both is almost the same as a new pair.  The cutting parts do come off so you can sharpen, smooth, whatever, and adjust them back in place.  Mine last for 3-4 years, depending on how much abuse I give them.  If I only used them for small limbs & branches ON THE TREE, they would last several years longer, as long as you take care of them--keep them oiled, out of the weather, adjust as necessary.  They are a good quality product.