In reply to Danzig:
I've used them since they came out now pretty much, from Gogarth to scottish winter. They have proves themselves as good pieces off kit. Firstly they do rack well, and only having 4 sizes is better for a lighter rack. They do seat really well in a variety of arrangements and placements. I've got the "old style" which are quite hard to pull through but I haven't really found this a problem. The Dynemma doesn't freeze up too bad either.
If its to replace a set of BD wired hex's then I'd go for it. They are what I had before and I found them so cr*p I never carried them.
Hope this helps.