Fks are really good, but not any better then alot of other bindings out there.
For what you want though there may be better options. For one they heavy. Now having heavy bindings is not to bad. The weight is centered round your boot so you dont notice it too much, but they will reuire you to work a bit harder.
They also are not the most durable. Well the binding its self is pretty good but the brakes are a pain. If you break a brake on most other bindings its a simple and reasonable cheap fix. This is not the case with FKS. The heel piece has to be removed and its not cheap or easy to find brakes.
This is the biggest issue with them in my opinion. They work great but as I said not any better then other bindings, so the brake issue makes them a no for me.