I have and have had several cutters - from coupon sales at Joann's, but mostly from garage and estate sales. I like the Olfa the best and none of them has worn out. However, the hub that the blade fits on has worn out on a few of the Fiskars.
I know that Olfa and Fiskar blades will work interchangeably, but Olfa blades each have 3 sprockets in the hole area, and I think they are there for a reason.