What an AWESOME gadget, I''ll give it a 5!  It does works as promised and is so easy.  I had such an improvement after I started using it.  I am glad that I got it!

I took it to my Tri swim class, and everyone loved it. Great instant feedback.

I was a little concerned about the noise this product made.  So I asked the lifeguard to listen for it.  He said he could not hear the click - click.  So that was encouraging.   I'm anxious to see if this helps my swim stroke.  Time will tell.  Very easy to put on and take off.  Right now I use it for 50% of my workouts.

It does what it is expected to do. I was merely curious as there is so much now on hip rotation and everyone keeps talking about it. The only thing that I will accredit is that it makes you mindful and  conscious of  rotating your hips. If you have issues with rotating your hips then this device will pay dividends but if you already have good rotation as it is, my advice is to pass on.  I do not really need this.  I did try to contact the Company  Tech department and left them a message. I could not figure out how to swivel from 35% to the 45% and I got no response from Finis.

I was only rotating completely on the right side 60% of the time. In one day I learned to correct that and the third day I got 100% Clicks. Hooray! Of course, underwater, all the other swimmers can hear the clicks so I had to explain. Drove them nuts for a while at the La Jolla YMCA. Now I will start on my backstroke.

I have poor hip rotation thus need anything that would help them get with the program.  I use this gizmo to learn swim with proper rotation and it does help.