I just bought addi circs in 12", and my lys had little bamboo circs in 9", which I'd never seen before. I didn't buy them, because they seemed like they would be really hard to hold. I do like the 12" ones though. I did a cuff on a sweater, which was only 30 stitches, and it was very easy. BUT, there will come a time when even those little ones won't work, so out come the dpns or other solutions mentioned here.
PS - I've had good luck picking up Addi on ebay, coming out of Hong Kong, pretty cheap. I don't know if they're fakes like my Louis Vuitton handbag from Korea (hmmm), but they feel like the real deal to me.