IAP saved me ~$750 on two r/t Z/J tix on AF/KLM to Athens. $6250 from AF, $5500 from IAP.
$750 is about what our Platinum cards cost. Without IAP, I would question Platinum's value for us.
I did like the previous IAP because the tix were full fare, fully refundable (and even on BA allowed seat selection at purchase).