Mine hasn't let me down. It's a 2wd on 31" street tires (don't ask lol). Most recently, I hit a VERY muddy clearing before a bridge, didn't get stuck. Drove across to the other side to turn around, almost got stuck, she climbed right out in low gear. Back on the first side, hit a thicker patch of mud, she sank. I threw her in reverse, then it low gear and floored it and she climbed right out once again, while my buddy was sliding and spinning all over the place in his 4x4 F-150.
I've also jumped it over hills, slammed into another truck while sliding in mud, done countless donuts on dirt and in mud, fell in a few ditches, driven up and down canals at extreme angles, among other things.
Pardon me for thinking these trucks are unstoppable. Can't wait to find myself a 4wd one day.