Here is what Discmania says about the Maestro:
 
The Maestro is the brand new midrange featured in Discmania’s Active lineup. The Maestro is a low profile midrange with a bead that helps flight as well as making sure the disc releases smooth from the hand every time. This midrange has a straight flight with a slight slow speed fade making accurate approach shots a regular part of your game. While most midranges have a larger diameter, the Maestro features the same diameter as drivers and putters making this disc fit more comfortably in the hand.
 
Good for: Control backhand and forehand drives, Upshots, Scramble shots