I bought these needles for my wife who likes metal needles. They have an extremely smooth finish and feel good as you knit as they have a nice weight to them.
The disadvantage of them is that they are so smooth it can be hard to get a good grip on them to tighten them on the interchangeable cords, so they can become unscrewed, which is annoying. For this I prefer the wooden Symphony range from KnitPro; which are the ones I knit with.
As a system the KnitPro are great. Its very usable. I find some of the cords can be a little catchy, but the system is excellent value for money.
Sconch are, as always, brilliant! Thank you Sam and the ladies!