I was already impressed with the headphones when I first tried them on. I got the GoAir Tones and was excited to see that the charging cable is part of the case, I thought that was super cool! Then I looked at the instructions and realized you can even adjust how the headphones play music??!! Like you can decide to boost your bass or make the voices in music easier to hear, ect. and I fell in love! They also have an option to turn off noise canceling so you can hear your surroundings while playing music which is super nice too! My only wish is that in the custom EQ option, I wish they explained what each slider did so I could actually play around with each one to figure out how I want my music to sound.