The CBA has emerged to hold the highest overall satisfaction of the big four at 82.2%, according to the latest study by Roy Morgan Research. But Westpac grabbed the top spot with 83.6% in terms of MFI or main financial institution customer ranking. CBA follows close with 83.5%, with NAB next at 83% and ANZ at 82%.
In general, the numbers reflect the improvement in satisfaction by the big four over the last 12 months, which is at 0.5% points.
The most improved among the big four was Westpac (up 2.5% points), followed by the ANZ (up 0.9% points). Small declines were found in CBA (down 0.4% points) and NAB (down 0.2% points).
Roy Morgan’s study also found satisfaction among the housing loan customers of the big four increased by 1.7% points over the last 12 months, compared to an increase of only 0.2% points for other customers. 

It can be confusing to know whether to get a variable rate or fixed rate mortgage, and what features are important. That's why it's important to not only check the right rates, but make sure that you're getting the right features in your home loan. Get help choosing the right home loan