I wouldn't, but only because I despise debt. others would probably call it a no-brainer win. I just think of things that can happen while I have a bunch on a credit card--injury, job loss, lawsuit, medical emergency, etc. and it would be one more thing to worry about, for little gain.
I passed up this card myself because I just got a 1.5 percent cashback and $150 bonus Capital One card. Even though the Ink is a "better" deal, I just don't want a bunch of cards floating around.