I have always used Fiskars. From the very first just a blade to the most recent.
I just purchased this one
Fiskars - 12 inch Portable Rotary Paper Trimmer - Blade Style F
For the first time ever this one did have a problem. I could not get it to cut straight. I called them and a replacement was on it's way in no time. It works fine. Though I still use the old one when I need a very thin cut, just seems to work a bit better.
So this is my preferred cutter.