I think the card is great, and use it most everywhere. I pay my taxes, car insurance, cable bill, groceries, etc...pretty much everything with the card. This past trip we all flew for free with the card so its well worth the $40 per year.
You should note that the Jetblue points program will be changing this fall. It may effect your decision.
https://www.jetblue.com/trueblue/newprogram/