Anyone one here used it before ? Like some info and feedback.

Wow nobody has used one, that's surprising .

There was a posting about them here on TradGang back in 2015.    I looked at the idea once upon a time, but IIRC they were 'way too expensive.  Hadn't heard a word about them in years...

Once upon a time I wanted to built a replica Ottoman bow from the early 1800s which used a hinge for takedown, but I just used a marine grade stainless steel hinge. 

We use them I have one on my bow. Rock solid when installed. have one in a #70 lb bow. I know a few others that have used them. Including Steve Turray