The description says "stiff", how much...
The description says "stiff", how much does that affect the snowboarding and what kind of snowboarding style fits with stiff bindings?
The stiffer a binding is the faster the response. If you move the binding moves then your board moves. If the binding and board are soft, then you'll have a little give when moving your feet around.
Different people like different bindings. Some people love stiff bindings to jib, and some like soft. It is all personal preference.