I have the GM-15 15 microphone case. It is the perfect solution to mic storage and transportation. I can bring nearly my entire stock of wired mics to the stage. I use the cable storage as more mic storage for my SM102 hanging mics and SM91 and Beta91 boundary mics. The 15 mic spaces are perfectly sized for my SM57s SM58s, Audix i5s, OM5s, and every other mic in my inventory. Also being able to lock the twist latches is a nice feature as opposed to a built in key lock so I can just tell the combination to anyone that needs access instead of dealing with keys!