Yes I have one & am not a fan. Mine is the older version that requires Hornady shell holders or that you open up the center hole in an RCBS or Lyman. Maybe the new ones are better, IDK. Also it just doesn't feel "right " when I use it. That's purely subjective I know.
Note that over 1/3 of the reviews on Midway are 1 star.
I think much of it is ergonomics. Its got to fit. And a little to do with how many cases you prime in one session.
With me, I rarely load more than 100 cartridges in one sitting. Generally, the cases are primed and waiting for me in an ammo box. I prime as a separate operation, on a different day. I don't have a need for fast priming or auto feed. Others may load considerably more or prefer auto feed.
There are members here who have problems gripping or squeezing the handles. The tool is the wrong fit and difficult to operate. Grip strength is a really factor for some people as well.
I think that's why the reviews vary considerably.