How does everyone else like there Neck tite system?
I had the Si Tec Neck Tite system installed in my Fusion. Ultimately I found it to be unsatisfactory, and I've had it removed and replaced with the original Fusion neck seal.
I'm 5'9", 165lbs, athletic build, and have a L/XL Fusion Sport.
The problem I experienced was that the straps of my Halcyon backplate crossed my shoulders directly over the (11" diameter) plastic ring of the Neck Tite. This caused the BP straps to continually slide outwards on my shoulders which felt uncomfortable and insecure. I also felt like the Neck Tite ring compromised the fit and flexibility of the suit, which is why I bough a Fusion in the first place.
I spoke to Si Tech about this problem. They are aware of it and suggested that the plastic ring should have been "pre-curved" to better fit my shoulders before the ring was installed in the suit. The instructions to do that are shipped with the Neck Tite system, but the shop that did the installation knew nothing about instructions.
http://www.sitech.se/files/documents/products/60000/neck tite.pdf
So, in hindsight, I should have tried the Neck Tite at a White's Demo Day before installing it in my own suit. I think for the majority of users the Neck Tite will be satisfactory. But for some of us, depending on individual body shapes and BC being used, the Neck Tite will not work well.
I may try the Neck Tite system again if and when the original neck seal fails. However I will try to do the installation myself and pre-curve the neck ring before gluing it in.