With considerable astonishment, I have read the reviews here. I bought the needles 1,5 months ago and - although I am an absolute Vielstrickerin, honestly not tried all strengths. I have used the 3 Series, and the strengths 3,5er 5.6 and 7. 6 bobble hats, scarves 6 and 4 Babyschüchen and caps later, I can say that the needles are just great. Light - a boon for the wrists - and not too slippery (in which Gepfrimel with Babysachen otherwise unfortunately often a problem). Bamboo needles are now even a natural product - and as such you have to give these things on row - but after a few rows it runs like clockwork, and the more often you use them, the better they are. That the yarn breaks or even knotted, I can not confirm. (Wool for baby stuff is ultra sensitive!) For those who have little patience, you can possibly the "natural" greasing oil from your skin of hands pre-empt by lightly rubbing with a colorless candle. However, I have tried out, none of the needles to see a reason to do so.