The plastic is absolutely the same as on many other similar fixtures, it's not inferior to them in any way. I placed my microphone inside easily, and I think it will accommodate many various models, as long as they fit inside the plastic body. Now instead of a tight conical thingie that came with the microphone's tripod, I can use this one, and it won't transfer every bump against the desktop to the mic.
Works great with my xm8500