I have used both, I like the quietness of the max coupler, have never had a problem with my max coupler. About 250 miles with the Max Coupler, over 15K with the Lock and Roll.
The only negative with either that I have found, and not a deal breaker is the near impossibility of connecting a tongue heavy trailer while off road. If you can line it up on pavement, no problems, but when you have to disconnect for some reason on other than flat level ground, you have real problems getting it back together. But it is very solid and a easier design.
If you get yourself in to real off road trail while exploring, have to make a disconnect and turn around the lock and roll is much easier for sure.
Turning the trailer over, or close to is part of the real adventure to off roading. lol. Much cheaper and less dangerous than pulling the vehicle over with it. I can not handle the banging of pintle, so I recommend both, depending on your off road runs. Staying known trails, no matter how rough, I like the Max Coupler. Exploring, rock crawling, I like my Rock and Roll.