Very useful for what it does. I agree with other reviewers that displaying more than 7 stored items in the contextual menu would be nice, but it's not hard to work around that by directly editing the clipboard.

However, I really wish I could see it at all in the contextual menu when using the Firefox search function. That's what I use it most for, searching for groups of frequently used phrases; right now, I have to paste a clipboard item in an editable field somewhere on the page, then copy-paste that into the Ctrl+F field.