This card has been around for over 5 years. If you plan on flying a lot and buying tickets for others, you can surely amass a lot of points. However, be aware that your flight points only credit 1:1 as your purchase points.

As jeelele said, whether it's worth it to you depends on your needs. I have the card, but I much prefer my Schwab card, but I still buy air tickets on it. You get slightly better than 2% if you purchase gas and redeem on mortgage payments.