You should shop at Chadstoolbox.com for NWS stuff.. I haven't ordered from there yet, but it was the best prices and biggest selection when I was looking for NWS tools.
I do have a couple of the Irwin rebranded NWS stuff. Lineman pliers, right angle lineman pliers (no idea why they call them that cause they are more like needle nose) and the fantastico cutters.. one thing I CAN tell you, is that unless you have a specific need for those, they won't replace a good set of standard cutters like Knipex or the standard NWS version. They are great if you have something very thin and very hard to cut, but that's about it.. your hands have to do much more work since the handles open VERY wide for a very narrow jaw opening. Most things you'll wind up having to take two swipes at to cut too, which in my eyes, negates any advantage from the leverage. I own about a dozen different sets and they are not what I carry for work. I bought them to experiment and one day was enough to just toss them in a drawer at home, and put my knipex back in my lineman pouch.