For a limited time, Citi's offering new cardholders a zero-APR introductory rate for 18 months on both purchases and balance transfers. That means you won't pay finance charges on this summer's travel and back-to-school expenses until after the 2015 holiday season. Likewise, with just a 3 percent balance transfer fee of each balance transfer ($5 minimum), this card provides a great opportunity to slash your finance charges if you're consolidating debt.

After the introductory period ends, the variable APR which will be applied to unpaid promotional balances, new purchases and new balance transfers will be 11.99 percent, 16.99 percent or 21.99 percent based on your creditworthiness.

In addition, the Citi® Diamond Preferred® Card joins the ranks of American credit cards featuring embedded EMV chip technology. Popular in Europe for years, the EMV chip's showing up Stateside more often as Americans grow more concerned about credit card skimming. While some industry watchers expected U.S. retailers to leapfrog their payment terminals directly to contactless credit cards, recent data breaches at nationwide retailers and restaurant chains have spurred many merchants to offer chip-readers alongside traditional magnetic stripe scanners.

Along with heightened security features, Citi has loaded this no-annual-fee card with VIP benefits usually associated with premium travel credit cards. With Citi® Easy Deals(SM), cardholders can earn Citi Easy Deals Points for the purchases made with your card. Redeem your points for great online deals on name-brand merchandise, gift cards and even local deals.

Frequent travelers will appreciate Citi's suite of protection services, helping ensure your peace of mind when you're on the road or in the sky. When you purchase air, train, or other common carrier tickets with the Citi Diamond Preferred Card, you (and your spouse and eligible dependent children) are automatically covered for Common Carrier Travel Accident Insurance at no additional cost. Buy your common carrier tickets with this card and you're eligible to receive reimbursement, up to $1,500, if your trip is cancelled or interrupted for a covered reason. Travel & Emergency Assistance can help you get the medical and legal referral assistance, and translation services you need during a crisis on the road or overseas. Even if you're just looking for a low introductory rate to knock down debt or minimize your finance charges, perks like these make the Citi Diamond Preferred Card one of the summer's best values.