I love gadgets, but for the ones that are a waste of money. I have to go with the several different binding tools I bought and ended up using my little Creative Grid ruler. I also agree with those saying "rotary blade sharpeners." I bought just one and it didn't work. I have read reviews on the others and keep hearing the same thing.
I also bought a couple of Creative Grid rulers for cutting shapes out of 2 1/2" strips and ending up selling them because I don't use them. I also bought the Bias Strip ruler(?) from Quilt in A Day, but have never used it. I am going to sell it as well.
In response, to suern3, I love my Creative Grid rulers, but I am getting more discerning on which ones I buy.