In reply to jezb1:
I've fallen on a blue and green totem cam (basically the same as aliens I believe). I had more gear below them both times but they did hold. I was quite surprised that the green held, as the placement was pretty terrible (one of the lobes was really undercammed) although it was quite a small fall. The fall on the blue was a bit longer, think I was maybe a couple of meters above it but it held perfectly well.
When I first bought them I was pretty skeptical about how much I would trust them but after the above two falls I feel more confident that they will actually work. Although saying that, not sure how happy i'd feel if it was just a blue/green between me and the deck.