I have been a long time credit card customer of Citibank and they upgraded me to Citibank Rewards Signature two years ago. They also offered to make it a fee free card due to my loyalty which was nice. I find this very easy to use and have had no problems. They have a 1800 number to contact them and staff are always very friendly on phone. Rewards points are easy to accumulate and redeem for lots of different items. Also get 2 Priority Passes each year and international travel insurance (which I have had to claim on before.) The only issue I find with the card is purchases made online have steep international conversion fees, so I avoid using it whenever possible for this.

I haven't used the card overseas but have tried balance transfer before. It is really easy to set up the balance transfer. With this card, I also got free Priority Pass membership that gives me access to two lounges every year. I use this card mainly to accumulate points to transfer it to Kris Flyer / Velocity. I signed up to this card when they have promotion for a free annual fee for life couple years ago. Best card ever, I will keep using this card.

I use this card daily. It gives quite good rewards with cash back and products. But what I like best is that the Citbank team treat me like a person. I failed to make a payment due to a bank account mix up. They contacted me quickly and then waived the fees as soon as they knew the payment was on its way. The linked Diners Club card has limited acceptance in Australia but is a bonus for overseas use as it gives double reward points at no ongoing cost.

I signed up for Citibank Platinum during a promotion period where there are no annual fees for the life of the card. Platinum then evolved into the Signature card with the added benefit of 2 free Priority Pass lounge visits per year. The card has many benefits such as loyalty points, product warranty, and travel insurance. Customer service is good. I highly recommend it. Only problem is the hefty forex fees it charges.

I have had a Citibank Signature card for about 7 years now. The rewards scheme and benefits - including free travel insurance and airport lounges pass - are awesome. The service is excellent, whenever I have had need to contact them they have responded to my needs quickly and efficiently. Can't rate them too highly.