You have to ask yourself how much use you will get out of it. I purchased one and will get more than my money's worth. I paid $120 for my pack and will be using the $100 off coupon this summer and on my next trip through IAH am using the PC Initiation Fee waiver which will save me $50. Then I still have the companion ticket left. I have also used the 2 PC passes. I guess the 7500 miles are just icing on the cake.
Long story short...if you are gonna use it, its worth every penny.
Matt