I have an old TAK1 plain in D2 which is great, and I've just got an Izula which hasn't been field tested yeat, so on grounds that one knife isn't a pure bred RAT, and the other hasn't been christened, I can't really make any claim here. I like the old TAK1 and probably depend on it more than any of my other knives. The O RAT-7 was too big for here in the UK, and being more arboreal, an ax is a better option. I like the Atax on account of it being small and with no handle to carry around for that reason. I also have a Gerber LMF which is good, but not very refined. And I used to have a CR Roberts which had an awesome shape to it and sits great in the hand for almost any task, but I passed that on to a friend. So ATM it's the dependable TAK1 with my backup U2 hopefully being replaced by the new kid on the block, my Izula.