This case is solid and stable. The foam does its job by holding the microphones in place during transport. The "foam-bays" are optimal for Shure SM58 or similar sized microphones. I use it for Sennheiser e845 which is slightly longer than the SM58. The microphone is to long for the "foam-bay" making the microphone slide a little bit back and forth during transport. No big deal, but a bit irritating.