Short answer: some do, most of the popular ones do not, and the difference is not price.
The test that separates them
Ask one question of any training aid: does it do the work, or do I?
An aid that swings the club for you feels wonderful. You slot into a track, the club moves on a perfect plane, and you think you have found it. Then you take it off and nothing has changed, because the track was doing the swinging. Your muscles never had to solve anything, so they learned nothing.
An aid that holds a position, or tells you the instant you leave one, works the other way round. You still have to make the motion. The aid only removes the option of making it wrong. That is a constraint, not a crutch, and constraints are how motor skills are actually built.
Why the feel matters more than the gadget
You cannot hold a swing thought for eighteen holes. Under pressure your attention goes to the trees on the right, not to your trail elbow. Anything you have to consciously remember will desert you exactly when it matters.
A trained feel does not need remembering. That is the entire case for using an aid rather than reading another tip: you are trying to move a change from your conscious mind into your body, and repetition against a physical constraint is the fastest honest route.
Where aids genuinely earn their money
- Faults you cannot see. You have no idea what your shoulders are doing over a putt. A mirror shows you in one second.
- Faults you cannot feel. Arm disconnection feels like nothing. A band or a ball makes it obvious.
- Faults with delayed feedback. Ball flight tells you something went wrong two seconds after it did. A physical gate tells you during the swing.
Where they do not
No aid fixes a grip you refuse to change, a setup you never check, or a practice habit of hitting fifty balls as fast as you can. Aids sharpen a decent process. They do not replace one.
If you want the version of this that applies to your specific miss, start with the range and pick by fault rather than by price.
