I'd sure love to hear from someone who has used the new one, especially if they have used it with a harness setup. The relief worried me a bit.
I have had one since they first came out. I would reinstall the new ring from SiTech in a second. I use a BP/W, and dive in Monterey, CA. Last dive I had an inflator leak on my primary suit and used my back-up with the old type of SiTech neck ring. While the old style is comfortable, the new one is completely un-noticable. FWIW, I'm 66", 140#, and female. My suit is a women's large DUI TLS350.
Hope that helps TSandM