I haven't put these into use yet, but they feel like a quality piece of hardware. Relatively stiff action which, hopefully, means they will remain effective over time.
Used these on the ends of a draw cord on a top quilt design. Lightweight and durable. I love that there are no metal bits to rust away.
I've always disliked small cord locks. They don't really lock at all. These are an exception. They hold tight on bungee and cord alike. I'll never use another.
I can't say enough about how impressed I am with RBTR, the customer service is above what I expected.