I used a Pullrite ISR 18k Superglide for several years and, after switching to a Class A, sold it to my neighbor who still uses it. Works great, easy to hook up, no "chunking", etc. Really liked how the jaws came entirely around the kingpin.
Only thing I would say is that you have to be a little more diligent with greasing/oiling, but not a big deal once you get the hang of it.
One drawback if you plan to remove it from the truck bed frequently, that dang thing is HEAVY. Really take two to heft it out and back in again. But you can remove the head to help a little with the weight.
Happy shopping!
Greg
2014 Tiffin Phaeton 40QBH (Sunlit Sand)
2015 Jeep Wrangler Unlimited Sport (Black) Toad
Demco Base Plate & Commander Tow Bars