I was concerned they would be too flimsy, but I really love knitting with bamboo sticks and wanted to try them. While these do flex a little, they have held out pretty good so far. I am almost finished with my first sock and I bought a back-up set of a different brand in case these broke and I haven't had to use them yet.
I bought the bamboo double points to test the difference between bamboo and metal double points, and I concluded that, for projects like socks, I personally prefer the metal double points, as the bamboo doesn't release the yarn as readily as metal needles.
these bamboo needles are the absolutely best that I have ever knitted with. I am making socks on size 1 and they move the merino smoothly along they are flexible and have the best finish of any bamboo needle. I have used this brand of needle for years in a single point and I am thoroughly happy that I decidede to purchase these double points.