I recently purchased some Knit Pro Karbonz DPNs.
For a start off, they are a work of art. I think they look sleek and quite unusual.
My usual DPNs are the Knit Pro Nova metal ones. I prefer the metal ones to wooden because the stitches move quicker, it speeds up my knitting and I enjoy the process more with metal needles.
I've knitted a pair of socks in the Karbonz. The pros are that I can see is they are lightweight, flexible, warm to the touch (a benefit for those with arthritis or other issues with their hands) and the stitches are less likely to drop off the needles (they have a similar surface to wood, which is a bit more clingy than metal). In general, I prefer them to wooden needles. Though lightweight, they have a better balance to them than say the Symfonie wooden range. They have the benefits of wooden needles but with the extra pointyness of metal needles. If you are a knitter that prefers wooden needles then it is seems to be a good middle ground between the metal and wooden ones.
|Top needle: Karbonz|
Bottom needle: Nova
Shows same size needle.
The only downside is the join between the metal tips and the carbon. Don't get me wrong the yarn doesn't catch at the join, it's a smooth join but I'm aware of the difference with how the stitches move from one to the other. I'm perhaps being a little too picky with this and it doesn't put me off them. Though, (especially with the higher purchase price), I won't be changing all my current Nova needles to the Karbonz.
I'll be quite happy to use the current set I have. I've compared them to other Knit Pro needles, as I thought this was fairest since it focused more on material than make. I have other makes of needles too such as HiyaHiya and Addi, which I've always been happy with too. Knit Pro seem to strike a good balance between quality and value for money.
A little photo of my current WIP, made using my Karbonz.