I’ve been using citibank credit card for more than 15 years now. I don’t have any bad experience so far. I observed one thing over years. If you use credit card within your limit & with caution, there is no problem at all. Make regular payments & don’t take loans.
The card works everywhere internationally. Infact, the card saved me on one occasion at midnight in USA. I had to rent a car & they don’t allow to drive the car if you don’t have a credit card. My citibank card saved me at tha time.