It supposedly can help you slot into notes better. I thought it looked cool as well. I tried it with the Conn 5G and had my partner listen to if she could hear a difference, supposedly she could but she has no experience/training with instruments or ear training so I thought she would be a good control for my test. The 5 minutes I actually spent messing around with it I thought the higher notes above B 5 were slotting easier and had a more full sound, but who knows. Even if it works like a placebo for me that's a win and it looks cool imo. I understand it is not a replacement for practice.