It has kicked out the others...
This biner made its way into my collection and kicked out the others as the primary belay biner. It's not too large and bulky as some of the other usual belay biners are (William, Rocklock), but still is large enough to where I haven't ever felt like it needed more. Belaying, rappelling, hitching, it seems to be large enough for them all and is smooth to work with. The red on the unscrewed locker too is a great reminder too (good idea Petzl). I probably don't need many in my collection, but for belaying, it's definitely become the biner of choice.