Pros : You just can't find another pair of nippers like these. I've had one pair for 18 years and they could be used to cut lead. I've use them for cutting copper, zinc, stainless steel wire; you name it and these babies can cut it. Lately, I've purchased a pair dedicated ONLY for cutting lead but still use my ancient ones for everything else. The wear you'll receive from them is well-worth the money spent.
Cons : This product has no cons.
Other Thoughts : Take care of your tools: always spray them with a lubricant/oxidation inhibitor at the end of each work session.