...and have an educated finger...
You bring up the point that bothers me the most about a Jewell.
The too-narrow trigger itself.
And yes, my trigger finger is quite well-educated.
I like my finger to be able to feel a trigger before I apply pressure. The thinness and shape of the Jewell just doesn't work for me, especially on a hunting rifle.
I have a few on target/groundhog rifles, but no way would I put one on a big game rifle.
Another point... their strong suit is when you need a trigger pull measured in ounces. For a 2-3 pound pull, I can't think of why you'd need a Jewell.