I have one. I've read several posts about it here. It works better then I expected. I watched a demo at the Paducah quilt show and the vendor said to not wait until the blade was dull to sharpen it. Sharpening a dull blade is not the goal. I run the blade through the sharpener before I start cutting for a project. It's easy to use and safe. You don't have to take the blade out of the cutter. It will not take out nicks but keep a sharp edge on the blade. I haven't changed blades since I bought it months ago.