I'm super interested in the Flex. Most days, I have no reason to carry a saw or a file, and I just need a knife and a pair of scissors. But on other days, I want a saw or a file or both. This would give me the option to set up a "perfect carry" each day. They seem to have a good variety of tools available, and the mechanism looks easy and satisfying.
I'm planning to pre-order after I sell a couple tools I don't like carrying as much.
(I'm selling my Deluxe Tinker and my FREE T4. They're great tools, but I prefer my Super Tinker, and once I get a GOAT Tool and a Flex, I don't think I'll want to carry the T4 again.)