eh.....I had it in my previous car both with stock brakes and a Prodrive BBK. It wasn't this "omg amazing" difference by any means. Mine eventually blew, went back to the dual stageSingle stage brake booster is the only way to get rid of the mushy brake pedal...from what I've read and researched. Especially if you do a 4/2 pot brake component swap.
too broad a statement to make IMHOI wouldn't get Ferodo pads, they're pretty crap. I've got the midrange pads from them and a friend has the high end pads on his Evo. They blow goats.