Don't want to start any heated debates; but when I bought my kit from Tip Curtis, he pretty well let it be known he prefers them to all others where that type of lock is applicable.
Yes, he told me why, but I'm not knowledgable enough to make any counterpoints to any arguments, and I don't want to be the new guy seeming like he's running his mouth about the standbys and knocking peoples product.
Tip not only sells LOTS of kits, he builds LOTS of rifles, and he has LOTS of match plaques and trophies. That was good enough for me.