Does anyone have any experience in using this add on for their seating dies and are they even worth buying one?

Have one & they work fine. A bit hard to read the settings though as it is not coloured, just grooves on the metal. (NB. This is for the fine adjustment).

The good thing is that 1 fits all Hornady dies. For the price very definitely worth it.

I use one too, on the Hornady dies for which I've not acquired the more precise Redding or Forster competition seaters. If you don't change the die locking ring they are quite precise, but as pointed out, a bit difficult to read. If the tolerances of the Hornady seaters were a bit tighter they could compete with the expense ones, but as with most things, you get what you pay for.

I have one as well. Works just fine. If you want it to be a little easier on the eyes, run a crayon across the grooves and wipe off the excess.

Turok

When did you guys buy yours? I got mine about two years ago. I'll have to pull mine out, but if I recall, mine looks to have a graduated sticker in place of "adjustment grooves". It does work, I just thought it to be really cheesy.

Coot.