In reply to UKC Gear: No review of their holding power? Why not get on something steep, plug one in, back it up a little lower with a bomber gear nest and take a big lob on it? Surely how well they hold a fall is far more important than any other consideration.
Also, how about a bit of abuse, jump up and down on them, mash them with a few rocks, see if that has any effect on their trigger wires/other aspects of performance. Obviously you can't get a perfect idea of long term wear and tear over a short review period but there's no harm subjecting them to a bit of the abuse they would normally receive from being sat on, thrown to the ground at the bottom or a rucksack, bent sharply over a lip during a fall, etc.