I say yes, yes, yes, yes. I struggled for years trying to free motion, just couldn't get it, always looked horrible. Then I saw the slider at a quilt show, bought it & boom, all of a sudden free motion clicked in. It was a tool that made it possible. I used that slider til I actually wore it out (after a couple of years), caught it under the needle a few too many times. I was going to get another one then realized I no longer needed it, my hands, brain, movement finally worked to gether for free motion-and easily, no shoulder or hand pain, just easy movement. Go for it, well worth it.
Maire