It does work. Now I never bothered to hook my VBox into the jeep and do a before and after test, but I felt it was a relatively significant difference. Call it a "seat of the pants" accelerometer....far outpacing pad replacements, SS brake lines, and a re-bleed of a perfectly fine system (mine was a 2014 JKUR with less than 8K miles on it) The effects were significant enough that most anyone felt it was very noticeable difference and would definitely help more than a bit especially at medium and higher speeds. Again, its not sports car performance, but it makes the jeep stop a lot more like a normal car. How much closer to a normal car? i never measured, but I was generally happy with the purchase....and I can't say that for many things I buy. Now many here would say that they don't trust the quality of the kit that I bought. I can't say anything about the porosity of their castings, or who was the OEM for the calipers, country of origin, etc. All I can say is that it was decent for 800ish dollars. Anyways...this is a dead horse. I'll stop beating it.
