Wish I had them on my Escalade ESV 10 years ago.
I have had braking situations that were unsettling. Brake fade, grab, and lock. Since installing new rotors, stainless steel brake lines and the performance brake calipers, all from auto anything, the ESV stops almost like my Zo6 or S63. Not as short but more stability.
Worked surprisingly well
The pump would stick a little when I first started using it but that quickly went away. It did an excellent job reverse bleeding the brakes and resulted in a firmer pedal. If call it money well spent and is much faster and easier than old school bleeding with a friend stepping on the brake...