I think you may have had a bad experience. I've had nothing but good luck with SGP. My white silicone slightly discolored and they have sent me a replacement, no problem. Easy to work with, and very responsive.
I am not sure why they say this on their website because the top microphone has a hole cutout in both the silicone and the hard plastic piece. I've been using my Neo Hybrid 2S snow series for about a month and not a problem with the microphone.