I got the starter pack and an extra controller, the archery seems much more ‘natural’ with 2 controllers. There is also a navigation controller for the FPS games that are coming out like Killzone 3, but apparently you can still use your old controller for this.
I traded in 5 old games so it all wasnt that expensive in the end. Just been playing with the eyeppet and can se how it would be great if you had kids!