My Vallotton SERE works GREAT except in reverse grip(tip down) auto opening I find that sometimes it opens so fast that it bounces back a little before the liner lock engages. It is the liner lock and the pivot screw that stops the spring that pushes the blade and if that spring gets ahead of the liner lock it will stop it from opening fully. It might not be something that will happen in all of them but it happens sometimes on mine. Its funny, as I write this and try to reproduce it, it doesn't happen, so it might've need some breaking in. In normal auto opening it opens swift and solid! I always wanted a SERE 2000 and when I saw this bad boy, that was it. It does have the semi custom price and is so close to the original given the price difference I can see why some might not go that route, but those of you who've handled one will know that it is worth every bit of it. Given the limited run I'm supprised that they are not numbered.
I think that dual action is the best! Rather have that over fully auto any day. If you CAN get one and can afford it I say that's the way to go!