I purchased this kit along with a NYX-14 and can report I am very satisfied with Armasight products overall. I will probably not use the rail mount, but I could see its benefit in certain scenarios (adding an ability to adjust the hight of the weapon mount would be nice). The components in this kit are very well constructed, very strong, and precise machining. The only part I believe could be improved upon is the head mount chin strap, which has a very small piece of velcro and buckle that is a little difficult to attach/detach, and I could see it having a limited lifetime before I need to jump on the sewing machine and upgrade, but that is being a little picky on my part... I am very familiar with design and industrial sewing and would have done it differently, but it would be a very easy upgrade and wouldn't detract much from my opinion of this equipment.
I actually spoke with who I believe is the owner of Armasight on Christmas eve. I was trying to finalize this order, called and left a voice mail (not thinking I would receive a returned call until after the holidays) and received a call back within 2 hours providing advice on my purchase. That was very impressive to me. Overall, I would say I highly recommend this package and Armasight highly.
Pros: Durable and well made
Cons: Chin Strap and velcro on head mount could be better
This review was written in the old system and had content requirements that are different than reviews written today.