I got a full set for my AR1.viewtopic.php?f=3&t=118212&start=630#p1058412
I was initially worried about having enough length to complete the build. The rear, chainstay-mounted brake requires a fully-housed run of brake cable inside the frame, which is much more length than the typical two segments of housing from handlebar to frame stop, and from frame stop to rear brake. Turns out the kits come with a fair bit of extra segments, so I had enough for the whole thing. I'm not sure that would be true if I were doing just the brake lines though, since I probably borrowed from the shifter set to make it happen.
Aside from build-specific length issues, it's pretty easy stuff to work with. I didn't try any crazy tight bends, but I can see how it could handle them better than traditional housing. Shift and brake feel leaves nothing to be desired. I don't really notice cable performance when I'm using the bike, which is a good thing; I'd only notice if something were going wrong.
If I'm reading my records correctly, the weight of everything in the packages (brake+shifter) was 225g. A bit under the 118g + 115g weight I've seen quoted elsewhere. I'd estimate I left ~25-50g unused for my build. With traditional rear brake run, that would be an extra ~20g or so saved.
The kit came with two inline barrel adjusters (this style
). I used these for the shifter cables, but I'm not satisfied with how well they work. They are pretty stiff and it's difficult/impossible to make adjustments on them while riding. Sram cable pull ratios being what they are, I don't really have to worry about that, but it's still irritating. I cannibalized another inline barrel adjuster (this style
) for the rear brake cable, since the direct mount brake has no barrel adjuster. I had to do a little hack by crimping a housing ferrule and wedging it in to the end of the barrel adjuster to keep it from rotating freely around the housing, but I am much happier with how that barrel adjuster works. Not nearly as much friction, so it's easy to twist it with two fingers while riding.
Pay attention to segment diameter when comparing to traditional housing and other brands of links-style housing. The Jagwire is a hair over 5mm at its widest, and that goes for both brake and shifter housing (of course). So be sure that you won't have to put the 5mm housing into a space designed for 4mm shifter housing or something.
Overall, I like the system very much and will probably buy new sets for my other bikes as they come due for a recabling. If you want, it would be easy to take the whole system apart, flush the plastic liner with soap and water, then reinstall everything with some pre-lubed cable and get a like-new system without buying any additional housing ever again.