We all get used to using different tools when sewing, however when unpicking something I prefer to use the Quick Unpick.
The brand I use is called "Clover" and the quick unpick is a brown color. It is very sharp. When I open a new one I write the date on the handle using a Permanent Marker pen. This way I know which one is the sharpest one because it has the latest date on it. Don't throw the ones that are not so sharp away. They are still good, but I only use them when I am unpicking a few stitches. The new sharp one is for when I have a lot of unpicking to do.
Happy sewing
Judith aka genie