If you need something more to add to the experience, try the Firebird pedals. Although they are PC-compatible pedals they will work with the Mac Firebird. You just connect the pedals to the Firebird. Unfortunately, I did not test them. The only use for the pedals would be for something like Indy Car and for flight sims as the rudder controls.
Durability is a crucial factor when purchasing an expensive peripheral.
I prefer this arrangement to the Y connector provided with the Mousestick II, but they achieve the same effect. Well it seems pretty firm to me. The Firebird did not give a bit. In comparison, the Mousestick II creaked a fair amount before I decided to stop. All the Firebird's plastic fittings are well constructed.