These are very good. I've put them in my giant MPH root brakes, formula and now Shimano saint m810. Paired with saint ice Tec rotors, these are brill. Great usable modulation and power. A perfect bite feel too. They have a good wear rate too, they last for ages!
I've been using one of these on my 1x9 winter hardtail for the past two years. After a few minutes refining the alignment and cage height it works exactly as it should.
I did break one cage after about a year, but the fact that Superstar stock spares meant that, for just a few quid, it was brought back into full service in no time.
To begin with it was a little noisy in the lowest gear, but the
Bought these because the original hose wasn't long enough.
They aren't as stiff as my goodridge hoses and are obviously not as good (but half or even a third of the price).
They do work well (no leaks etc) (on shimano slx 2013 brakes) and maybe do improve the braking performance (never got to try the brakes with original hoses).
I would recommend this product. (easy to install also !)