I have EDCed my Arc LS with both the clickie and the twisty and for a while I couldn't make up my mind, but now I have definitely settled down in the "twisty" camp. I have one of the coveted narrow HA twisties that is a great match with my LS head. I absolutely LOVE it. I had the clikie activate in my pocket once. YIKES! That thing got HOT. And burned up most of the life in the battery, too.
The twisty makes the LS into a piece of art work. When I put the twisty on my LS, my wife tells me it's her favorite of my lights. I like that it will not accidentally activate, and that it is smaller, and that it makes my LS feel better to my hand. I have never had any problem with different battery brands. They have all worked. I have never crushed any batteries, either.
I too wish that Peter would make a run of narrow HA P-123's. He could charge $35 each and sell out the entire special run of twisties. I understand why he switched over to the clickie--or at least I think I do--and I appreciate the advantages of the clikie, but why not keep the "twisty" faction supplied too? Sell them "as-is" with no guarantee that they will work with any particular battery and so on--fine. But why not sell them? I recently just bought an Arc LSH-S on B/S/T almost solely because it came with a narrow HA twisty. It's going to be a Christmas present for my brother. I can tell you that I would rather have bought an LS straight from Arc if I could have also gotten it with a HA twisty to boot.
Here's another thought: perhaps we could organize a "group buy" for hard anodizing a batch of the bare or chem koted twisties. Is there someone who could do that? Is type III HA hard to do and hard to come by? Because I have seen many "WTB: HA narrow Arc 123 twisty" posts in B/S/T. There's definitely a demand for them right now.
Also, I think that the foam washer works better in the head, despite a thread I started earlier. The reason is mainly that there is still space left for the foam in the head when the battery is making contact. In the tail, the space is very small at contact, especially with SF 123's. This means that you need a softer, thinner foam, and it doesn't work as well or have as good a feel as a thicker, stiffer foam in the head. I'm sure everyone but me knew this which is why almost no one replied to my thread. Ah well, now I know it too.
Anyway, the twisty is great. Simple and elegant and reliable.