I've never owned or used one, but I've been tempted and played with them in shops.
I want to like spydercos, like all the cool kids, but I can't bring myself to buy one (yet).
I don't know what it is.
In any case, if the price was right, I'd definitely consider their sheepsfoot or fixed blade Salts as pocket and deck knives. I've heard nothing but good things (mostly from Dunc

)