Finished putting on the last Moog end link today. Put on the fronts a month ago (K750578 and K750579) and rears this week (K750573). Have 103,000 miles on the JGC so it was time. Probably should have done them sooner.
Installation was easy. Getting the old ones out was a PITA. Likely if you do these at less than 100K and 7 1/2 years, the nuts may come off without much trouble. The fronts were easier, didn't have to cut any of the four bolts. The rear, had to cut 3 of the four bolts off. Jacked it up nearly 20 inches (jack height) and it was easy to cut them off. Top two were really easy to cut, the bottom one took a little while longer. A flex head ratcheting 18mm wrench will really come in handy for loosening the nuts. Also, for installing the rears, loosen the sway bar with your impact wrench and for the lower bolts (holding the sway bar) have someone pull down on the muffler pipe. Next time it will be very easy to swap them out as the replacements don't require holding the bolt at the end and using a ratcheting wrench to loosen as the bolt has a fixed nut on it to hold it from turning. Have a pass through socket set, but the ratcheting wrench worked better.
I can definitely feel a difference with the new end links. The old ones were definitely shot once I pulled them out and checked them ... no resistance.