Absolutely a joy to use. Lightweight, super strong, and the lock works easily with one hand. I wrap my thumb over the gnurled surface of the locking cylinder, and then I wrap all my other fingers on the same hand around the back side of the biner, and it just plain works, every time. It has never hung up or frozen on me. It's actually fun to repeatedly open and close it, it's so smooth. But it has never accidentally opened up me, either. I've actually had some accessory straps that it was attached to rip and tear before, but the lock held firm. And then black is all out tacti-kewl. My favorite of all my carabiners, by far.