Who makes the best Swiss-style muesli?

Who makes the best... Swiss-style muesli? It's a great way to start the day, but which brand is best? Should you pay a premium for Alpen, or does Asda, Sainsbury's, Tesco or Waitrose make a cheaper alternative? We put them all to the test.
As ever, this isn't an exhaustive test. If you think a different brand beats all of these, feel free to suggest it in the comments!

[@Wholiganify]

Co-op's version is worth trying. Need to have a go of that waitrose muesli though

[@whomakesthebest1251]

To be honest there are too many out there to try, although I've done a mega test (peanut butter) so may revisit mueslis.