I did my run in of my Cusco 2 way at the top of Old Pac in that big car park. I was stopped by coppers, I told them what I was doing... he then proceeded to tell me that he used to be in Mark Skaife's pit crew when he raced the 32...
I guess I was just lucky
But yes the throwing up is worth it, like any brake pad and/or clutch, if you dont bed them in evenly one side will lock sooner than the other, you can get vibration and all sorts of shit, trust me... i've seen it all!!!
Even if you dont, let me put it this way: Its a $1000 part and its half-an our of your life... what have you got to loose?