I’m a musician and an educator. I think this is an excellent tool.
My children are now learning instruments, and I just got it for them. They really enjoy it so far. There is some room for improvement. The first level has quarter notes and eighth notes. By the third or fourth level there are sixteenth notes. For someone who has been a musician for a while, it’s fine, but for beginners, that’s a very quick progression.
From what I’ve seen, this would be perfect for a student who has been learning for a while already or can get some basic guidance from a musician. It doesn't really teach the rhythms, but you do get instant feedback.
I’d like to see an easier progression in the beginning and some assistance with learning. Rhythm instruction is closely related to language instruction. I wonder if a few small adjustments would make this a valid tool to improve reading readiness and reading skills, especially for those with dyslexia....I was just working on a literature review on this topic.
You’ll have to get in touch if you want additional consultation.