Quite well, I pop my Blackout habitually about 15 times a day, and pop it for use about 5 times a day, i've had it for about a month and a half now, it's still in good shape, though I had to tighten up the pivot screw 'cause the thing got too loose, but some of this can probably be attributed to the fact that i've dropped it about 4 feet on hard surfaces on about 3 or 4 occaisons.
Also i've every confidence that if/when my Torison Bar breaks,Kershaw will speedily fix it free of charge.
Quite simply, i'm planning on another speed-safe or two in my future.