I just ordered my first pair of Hiya Hiyas. It's one of the metal fixed circulars. No yarn shops within driving distance from me carry them. I'm looking forward to trying them!
I like bamboo needles for some things, depends on the yarn. When I first was learning how to knit, I had bamboo needles and an acrylic/wool blend yarn. The stitches would NOT move off those bamboo needles. I took the needles back to the store figuring they were defective and stupid and I would never, never knit with bamboo needles again, LOL. Later I realized that I did like some yarns on bamboo, just not the one I happened to be using at the time. Cotton is one yarn I like on bamboo.