Just fitted mine, strangely no ABS light and low-speed ABS performance doesn't seem much better than before. I was deliberately provoking it to make sure the module was functioning so maybe it wasn’t a fair test. I haven't tried any high speed braking yet.
I am still running 17" fronts and also the front tyres are well worn compared to the back (which are brand new) but I thought I would notice the benefit of the 4 channel?
I'm suprised at that, but then I guess it is calibrated for 16" fronts. Total revalation on my car, you don't get ice mode anymore do you?