I ran similar pedals and was very happy with them. The only reason I'm not running them now is because I wanted to try a road pedal after getting numb toes. I think the wider cleat that spreads the force over a larger area has help that. It was either that or the fact that my road shoes had a stiffer sole, or both.

I did come uncliped once with the MTB pedals. It was on a hill climb and stood up to sprint up (it was a really short, but steep hill). I cranked really hard and popped out. Luckily it was on the upstroke and I easily recovered without any issues.