The CBA Diamond Mastercard is a great card. CBA have a great rewards program and we can also transfer our points balance to Qantas Frequent Flyer points. The only down side is you get 1 Qantas point for 2 CBA points but it's better then nothing and our last European vacation cost us $1500 less because of the points we had. I am very happy with this card.

only have single card for both wife and husband, great on rewards till recently amex cut down on its point system. accepts world wide and get alerts for every transaction you make.
can also link to apple pay and easy to use on paypal and apple watch.

Commonwealth Diamond card covers all my Monthly schedule bills and most shopping as well. My air tickets and complementary travel insurance give an extra bonus.
I have used my card a few times at overseas outlets and it is very easy and convenient to use. I am really happy with the diamond card and always trust with confident.

Had this card for years. Very happy that it links with qantas frequent flyer program.
Love having no interest on it when paid in full at the end of the month.

Also received this card fee free with Amex offer. Very happy using it with Apple-pay on mobile. When used for o/s travel bookings, the free Travel Insurance is welcome, (have not claimed on it yet for any mishaps- that is the acid test). Did not use it for travel expenditure o/s as using the associated Travel Cash Card avoided hefty transaction fees. Reward points are fairly ordinary, but as the card is fee free, I can live with that and claim a gift card every now and then. Have had no issues with the service from the bank and Netbank is a very user friendly website for checking transactions online and fund transfers.

This card was complimentary with the CommBank Amex card along with a mortgage 10 years ago, thus, no fees. CommBank changed their policy and abolished the Amex. The Amex was the points collector for rewards. This card has had so many changes with regards to collecting and redeeming points, that it is now losing its appeal. The points required for redeeming rewards has been standardised. The only value from the rewards is to convert points to Gift Cards for grocery shopping. Gift Cards can be received electronically or by post.

This card was given to me for free since I have mortgage with Commonwealth. For frequent flyer, it's only 0.75 points per $1 spend. So not great, but since it's free annual fee it's ok.
The good thing about this card is the free international travel insurance. You don't have to use the card to purchase the flight. You just need to activate it. I think it's up to 10 people who travel with you is insured.

This used to be a good value card for people that had a high monthly spend. Not any more. CBA reduced the rewards points for the AMEX over the last few years, and are now removing the AMEX option completely on September 1, 2018. Reduced points, reduced cards....no reduction in annual fee. Their Diamond Awards Card is no longer a good option for high spend customers.

Staff are very good to deal with, They even blocked my card one day because of my transaction history and sent me a text warning me that my card could have been stolen.Once they found it was me doing the transactions they unblocked it straight away. I high recommend this credit card and Bank.

One of best day by day credit cards with rewards.
Customer service is above average and provide you extra follow up and info to suit your needs
mobile apps is superb compare to other big 3 banks

I've been using CBA credit cards for about 10 years. I always enjoyed CBA CC card service. But they have recently made change with AMEX reward points after 1st July 2017, the new rules only gives 0.5 points instead of 3 points on per $ spend on AMEX, which makes the deal is not that attractive with $395 annual fee. Furthermore, you must activate the international travel insurance on the netbank before you departure, otherwise the insurance does not cover the international medical cost (which make the insurance useless if you forget to activate). Still a good card, but it does not suite my needs any more.

The CBA gave me this card at no extra cost to my gold card but it has way more benefits. The concierge service is great with fantastic seat allocations, It gives free overseas travel insurance, additional warranty on products and accidental loss breakage or theft cover.
Bought my last car on it and for 3 months the rate was .99% its called a "great rate". I then work it with a HSBC zero balance transfer and my new car has not cost me a cent in interest for over 12 months and my $15000 has been parked in a offset account at 7.25% making me about $900
I pay my bill in full each month taking off the "great rate amount" and I never pay interest
Excellent benefits and good point system with tripple points when using the free amex