beaTunes on par with other key analysis tools
The good people at djtechtools.com just published an article comparing key analysis software. beaTunes was one of the four contenders and performed as well as the others. That said, two of the other tools were much more expensive and according to user comments the fourth has stability problems.
The article also points out, that 100% accurate key detection is a myth, as (in this fairly small test with n=50) all four tools have error rates of at least 30%.