Great for new musicians. I use it for learning chords and my scales and I also like learning chord progressions as well.
It gives you so much when you're stuck composing. I'm relatively new to music theory, and for me, this makes everything I've been learning about chords super clear.
I have taught piano for 33 years. This is the best app for any level student. It is so easy to use and kids love it when I use the iPad in their lesson.