Been using a Max-Coupler for a couple years and it's never been an issue. Not as quick as a ball coupler sometimes, but your talking a few minutes. I actually have never used either method in the video; I always unhook the trailer receiver. To hook it back up, just line up the TV and then rock the trailer forward and slide it in. And I have a foot on my jack, not a wheel.
But maybe some of you guys have much heavier trailers than me. When I take an Explore out fully loaded with a lid, RTT and all, it's about 1800lbs. And if it's unhooked, it means I'm camping; that usually only happens in a flatter area since the RTT is going to be deployed. I usually take it into consideration when I'm going to be unhooking the trailer.
In regards to slop and backing up... there is absolutely no slop and it backs up just like a ball coupler. No problems at all.
-Josh