I discovered TB while looking for a wallet to carry to a festival. I quickly discovered the concept of O rings, and the myriad accessories that attach to them. Fifteen months later my husband and I both use TB for EDC, travel, dog training, corralling paperwork for meetings, corralling bulky items to get them from point A to point B, etc., etc.
So, for me it was O rings. What got you hooked, pun intended, on TB?