new X-chock tire locking chock?

I got a set.  I purchased around August.  So far i have been pleased..

I didn't notice any bounce reduction but i like them better than the plastic wedges i used to use.  The only thing i noticed is once i install and the tire temp comes down. You need to re-tighten.  They will loosen as the temperature of the tire comes down from the trip.  So a couple hours after i install. I will check and crank them a few more times.  As i have had to do on other types of chocks. 

I am also very happy with my BAL-X Chocks. Much more secure than a flimsy plastic chock, and does reduce movement too. I would not be without them, they were worth every penny!

I made a set out of old car screw jacks rerod and flat stock. They work great.

I use the BAL chocks. Made more of a difference on our old 30sk with the rear sissor jacks than on the new 30sk with the rear power jacks. The sissor jacks just have to much flex.

I use the BAL chocks.  They are probably the best out there and they are great for locking down the wheels so your rig will not roll. But I honestly can't say they do anything for movement in the rig. It may help some, but I can't tell.   I tried the slide jacks on my biggest slide and that helped a lot, but the pressure they applied to the slide warped the floor a little so when I brought the slide in the inner edge of the floor was raised up quite a bit. So I stopped using them.