In my experience the only benefit to being CPC eligible, I didn't take them up on it, and they hounded me incessantly until I emailed the guy back told him to f off. You do get a cooler looking debit card. Beyond that I don't think there are any tangible benefits.

I have a Sapphire Checking and YouInvest account with qualifying balances which waives basically every fee you can throw at the bank account. CPC just gives you some dedicated idiot that will annoy you.