I purchased one about 10-11 years ago. I was disappointed as it was not totally accurate. It seemed there was a little too much side-to-side play with the blade and after 3-4 cuts I had to sliver trim the edges again. I also noticed if you cut with the blade say to your left to sliver trim raw edge and then flipped ruler around so that the blade was to the right and placed a line on the ruler at the 2" mark it did not line up across the fold .. so I wonder if it was the ruler that was off or the blade? A couple of my quilting friends experienced the same problem... maybe we got a bad batch?
I hope the new ones are more reliable.