Some are better than others. One I had, did not have a good locking system and the gun "bent" and wobbled at the hinge. Just not a good implementation of the design.

It also prevented me from getting a good "cheek weld" because of its shape. I could not repeat my sight picture easily.

My shotgun folder was excellent quality (and expensive) but the cheek weld was a big problem.

I removed mine from both my rifle and shotgun and went back to standard stocks.