The main reason why there is less buzz about them is that they are China-based (Shanghai) and they belong to the network unit of intel which traditionally does not do any marketing.
Three years ago they had a one day event in Beijing on the side of
agora.io’s. Since then they episodically speak in some events in the US, but much less than anybody else.
Their product is stable and solid, they focus on the entreprise so they have an hybrid mcu/sfu to accommodate a sip gateway and other extensions. Their webrtc implementation is optimised for intel hardware with a lot of hardware acceleration other package do not have. Unfortunately their support is mainly in Chinese, and a little bit in Korean since their agreement with SKT on webrtc for IoT.
The choice of which media server depends a lot on your use case and which programming language you are comfortable with. Note that intel CS is closer to frozen mountain than to the others in the sense that it is closed source. It is free though (unlike FM).
Sent from my iPhone