Pretty rad, I love taking them into the park but I always get distracted by rollers and do butters instead of actually hitting jumps lol. They're tons of fun though.
I've noticed they carve into stuff reeeeaaaaally well. Like so much so that I almost feel more stable carving in, but that might be due to the width of the skis.
Rails.... I never take my bacons on rails. Or boxes. They are my babies and I wouldn't slide rails on top of my babies, would you? But if you want to, go for it. I highly recommend mounting them at the suggested mounting point on the ski, they perform amazingly well there and switch is no problem at -6. I am more comfortable hitting jumps switch on those than my centermounted walls.