I am thinking of upgrading our Delta AMEX to the Platinum card which comes with a companion certificate (after renewal) for a domestic RT flight. I know I still have to pay taxes and fees on the companion. The yearly fee is $250. I have never paid to have a credit card before, and I don't like the idea. But we are going to be taking a domestic trip once a year, and I'm wondering if the companion certificate might be worth it. We also have Global Entry, so we would use the statement credit for renewing that.
My question is, for those who have used a companion certificate, are there any hidden drawbacks? Like blackout dates or the certificate can only be used for certain flights (that depart and arrive at the worst times). Can they be used for travel to Alaska and Hawaii?
Any personal experience you can share with me would be helpful. Thank you!