Muesli often looks healthy because of all the grains and fruit, but you may be kidding yourself about its nutritional value, especially if you're paying for a premium variety. Choice tested 159 varieties of muesli and discovered that bargain-basement brands offer just as much nutritional value as some of their pricier counterparts.
The site offers summaries of options if you want a lower-fat, lower-sugar or higher-fibre choice, but if you're after a generally well-balanced choice, the bargain Home Brand, Coles and Black & Gold options are just as good a choice. Home Brand muesli was my breakfast of choice back when I did Mastercheap, and I've stuck with it ever since, so it's good to be reassured that it's not a nutritional disaster.
Pricey brands can also have interesting secrets: Choice notes that boutique brand The Muesli has 37% fat content, which is more than a Quarter Pounder, though it's healthier unsaturated fat so the comparison isn't entirely relevant. Hit the full review for much more on choosing the right muesli for you.