"Over 30 years playing guitar. About 30 years designing.These solutions are all gimmicky, and you'll be hard-pressed to find a professional using any of them on a regular basis (the most common solution for pros is a strip of double-sided tape on the mic stand or guitar headstock.)I've always assumed the little 'fifth pocket' on my jeans were made for guitar picks... one time I left it empty and grabbed a random pick at Guitar Center, that ended up in my mouth as most picks do, which made me gag and skirt hand sanitizer on my tongue. eew "

"The square/oval design was actually a decent usability solution –making it easier to choose the correct key without needing to look. I remember having two keys, and after a while choosing the correct one became second-nature. "