"Correctly installed, both braking and shifting feel fantastically positive. I would venture to say that the brake cable and housing 
combination is the smoothest, most solid I have ever used. Squeezing the brake levers, the cable pull is consistent and easy, 
and when the pads hit the rim, zero flex or sponginess is felt. It’s remarkable how positive and 
uniform both the front and rear brakes feel. 
 Action at the shift lever was very smooth and consistent, more or less on par with 
my previous best experiences of cable and housing combinations."  

---Velo News on Reaction

UPDATED VERSION 2 Reaction's brake housing is now 5mm in diameter and 
fits standard 5mm ends caps (ferrules)
Easier installation, but same compression-less performance you've come to expect.
The oversized step-down end caps are no longer needed.