Well, I have the all round types, I thought about the front only but something happened yesterday that made me glad I didn't get those. I was bringing down a spruce which had split into two at the base, as it began to go it spun slightly, pinched the saw and then slid off the stump towards me, clipping my leg (I assume it was hung into another tree higher up, which you can't see because the canopy is so dense).
I was watching it and expecting trouble so lept back but as I did so it released the saw, which came back with me, and its momentum almost swung it round behind me and I nearly landed on it backwards.
My safety mechanism is my brain, and I have a focus when I'm felling like nothing you'd believe, so I knew what was happening and threw it out of my way as I went down.
All it would have taken was for any of half a dozen other things to not go in my favour and I would ended up sitting on the thing.
I'm always in more danger of falling on the saw than having it go awry and bang my leg when cutting normally - type A is no good for me even though I dont climb trees, the environment I work in is too tough to guarantee keeping your footing and that's where the danger is.