I love the rotary ones! My regular Fiskars has perfect alighnment for mats with no measuring and I find it foolproof as long as I push the paper flush against the side. It is so fast.
I have one at home and one in my crop box.
I would love the Fiskars lighted rotarary but I don't need one now. I have to wear these two out first and one is lmost brand new!
Guillotine styles don't work for me. Never want another.