This thing is very stable. I've seen models that have a peg at the top that attaches to the king pin, this onehas the legs all the way up, which seems to add a lot to the stability. My 5th wheel is much less wiggly now that it's installed. It's made of very sturdy metal, very thick. It was easy for me to assemble by myself, but it is a bit heavy and awkward so if your older or not very tall you'll likely need another set of hands. I'd recommend this to anyone with a 5th wheel.

Very heavy duty we bought a smaller brand before,its ok but had to use blocks under each leg,this one fits with no blocks fits up to 68" hight pads are big its much better in controlling motion in the 5er also we use xchalks between the wheels works purfect on our 42 ft 5er

First and foremost, this tripod DOES help with motion control. But, it is HEAVY and cumbersome to set up. Now that we've had it and used it on a few trips, it really seems more designed with a long-term setup rather than the casual tripper. VERY sturdy and robust and the extension leg really helps to fine-tune the tripod, especially over uneven terrain. Also, as a tip, if ever you happen to be in a site which is very slanted back to front and even this beast of a tripod doesn't quite make it to the ground because the front-end of the 5th wheel has to be so high to level out, be sure to carry those plastic leveling blocks or some cinder blocks or stack some pieces of wood under the feet to meet the feet of the tripod. Helps to prevent rust, too. Keep your favorite rust-prevention spray on-hand, too -- being heavy, it gets knocked around a bit, scratches occur, and rust will develop, especially the feet.

I own a NuWa HitchHiker and we've had issues with stability for awhile. Especially when park on soft pads rather than concrete. Decided to try this stabilizer after researching several online.
I chose this one because it was heavier than many of the cheaper ones and while more expensive, not excessively so.

Pros:
Heavy duty. Legs are not flimsy and show no bend when tight.
The adjustment leg is easy to tighten.
Reduced movement at front of trailer significantly. We full time and my wife was awakened frequently while I was preparing for work in the morning. Now she doesn't feel movement while I'm moving around.
Easy initial assembly. Only 7 bolts. Required a 9/16 wrench and 9/16 socket.

Cons:
This isn't really a con because it is why I think this works well. This thing is fairly heavy. I set it up by myself but it would've been much easier with 2 people.
Assembly instructions aren't great. Mechanical aptitude helps.

Very satisfied so far. I'm watching to see how it holds up to weather. I tried a lighter weight brand and sent it back. I'd spend the extra $50 and get the heavy model. Especially if you stay put for longer periods.

I have a 2017 Cougar 28 RKS with three slides. It weighs 8500 pounds dry. Tripod came and yes it is heavy but that told me the quality of the product. Very heavy duty, adjustable legs, and easy to put together. Set it up in my driveway before I went camping and yes it takes a lot of the wobble out of the 5th Wheel but not all which is expected. Would recommend for your 5th wheel.