I've used the same little trimmer for YEARS, but recently no matter what I do it will not cut straight. I bought a big name, high cost trimmer and used it for one session and returned it. It tore the edge of my paper, you had to use gridlines to try and get a straight cut and there was no easy way to cut a 1 inch strip.
I thought I would give this one a try. I've only had it 2 weeks but it has made a straight cut each and every time! Super easy to use, silent and not only are the gridlines easy to use but you can use the rails as well to achieve straight cuts with each pass. One inch strips, which I do a lot of, are not problem. I love that I can change the blades for different type cuts and I really like the safety feature that keeps the blade from cutting little fingers.
I would highly recommend giving this trimmer a try.