I had used this item with an instructor and it was easy to see and feel the correct position of the hands/arms in the backswing. He said it was the only aide he recommends for purchase, even though there are many, many types on the market. I can see why this is all you need to correct a misalignment of the hands in the backswing.
It is easy to attach to the club for practice, using it is easy and after a short time, there is no need to continue as the hand position becomes automatic...
Money well spent! 5 stars

The Swingyde is the best golf training aid I've ever used. It provides instant feedback on both your backswing and followthrough. Not only did it help me fix my slice, but I now use it before every round as part of my warm-up routine to ensure that I haven't fallen back into bad habits. 5 stars

The swingyde is a plastic tool that attaches to your grip on every club in your bag. There are even configurations to help with putting and even ways to that allow you to use two at the same time for wedge shots. For $29.95, it's money well spent. I used this in my initial trials at playing and learning golf - but I found that it's good maintenance when your swing starts losing its mark. This fits easily in your bag for practice sessions. The only other useful training aid that does this is the Momentus travel iron.

Momentus Swing Trainers - Signature Tour Iron

This comes with two instruction guides and a 13 minute DVD hosted by Jim Flick.

This is a simple tool to help you know you're right on track with your golf swing. Immediate feedback is what this is all about. You know how your backswing and follow through should feel.

If you find the Medicus or Refiner iron too expensive, this is the alternative to help your swing plane get back on track.

Medicus Junior's Dual Hinged 5 Iron
Medicus Men's Dual Hinged 7 Iron
ReFiner Pro Hinged 5 Iron, Right Handed Mens

It won't solve all of your problems but it's a good start.

5 stars

I found the Swingyde to be an effective training aid, especially as it pertains to the swing plane and the follow-through. I used it with a six-iron and enjoyed hitting balls with it. But changing the Swingyde to another club was a bit cumbersome. I did not care to use the Swingyde with the rubberband as I found it a bit too confining and snug. My rating is due to the two negatives I have stated, eventhough I feel that it is effective and helpful in reinforcing the swing plane and encouraging a good follow-through. 3 stars

The swingyde is a plastic tool that attaches to your grip on every club in your bag. There are even configurations to help with putting and even ways to that allow you to use two at the same time for wedge shots. For $29.95, it's money well spent. I used this in my initial trials at playing and learning golf - but I found that it's good maintenance when your swing starts losing its mark. This fits easily in your bag for practice sessions.

This comes with two instruction guides and a 13 minute DVD hosted by Jim Flick.

This is a simple tool to help you know you're right on track with your golf swing. Immediate feedback is what this is all about. You know how your backswing and follow through should feel.

If you find the Medicus or Refiner iron too expensive, this is the alternative to help your swing plane get back on track. 5 stars