The real differentiator here is that the card will give you $400 CASH BACK (actually, $430+, including the points on the minimum spend) for spending $3,000 on your normal purchases with no annual fee for the first year. After getting your $400 or using Ultimate Rewards in another way (such as converting them to 40,000 United points, which, if you travel international can be worth a lot more than $400) and waiting at least 6 months, you are under no obligation to keep the card. However, if you do consider cancelling, you should consider requesting that Chase switches the card to a no annual fee card (such as the Freedom) instead. This way you can get the Freedom, which is good to have around for its quarterly bonuses, without a new credit pull and it is often better for your credit score to keep an older account.
Also note that there is both a Mastercard and Visa version of this card. I believe that the Visa has been more popular. It is not clear if Chase will give you bonus points for both, but maybe you prefer your card to be accepted at less international locations 🙂 Anyway, if you want it, the only way I know of getting it is via Mastercard’s website.