I have 3 sets of addis. I use the 12" #3s often,. because they work with thin yarn in smallish diamater round knitting. I never use the other ones. They are SO slippery that it makes it harder (for me) to knit. I love my denise set; the needles work with ALL types of yarn, cotton, mohair, merino, acrylic... it's never to slippery and it's never too sticky. I know *so* many people here love the addi turbos, but I don't like them as much.
*ducking from the tomatos*