My Take
I love that my kids don't need someone who plays the piano. I love that you can select speed. I love that you can select harmonic/melodic intervals. I love that they can work on their ears without someone there to help them.
It's not so visually appealing, but it doesn't need to be. It's not a dog and pony show. It's a get better ears show.
How I Use It
Tell your students what intervals they are working on, or what kind of chords (triads, seventh chords) and they can select those for their quiz. Once they tell the program what to quiz them on, it's go time. Absolutely perfect for ear training. I wish I had this in college!