On this last day of x-mas, I'll share me experience with stonewall:
I took it on my flamer build with 10 str and 10 end together with quick recovery, as my big fear is HH builds. I still got lots of knockdowns, which was a huge dissapointment. Although, I was able to escape sometimes after being hit. I remade without stonewall now, so if you see me in ghost town, go for the KO shots ;-)
/edit: Or just be my ally, as I rarely shoot first (yes, I'm that kind of wuss).