There are too many times when I want to coast in gear, but don't really want to bleed off speed, so I want the exhaust brake off. With the new system, I have to reach down to turn it off, with my old system all I had to do was push the button on the shifter, which didn't require a reach nor taking my eyes off the road.
I have found that I needed to change how I drive with this brake. I have learned by just resting my foot on the accelerator, I can keep the brake off and just coast in gear. With an automatic, I can more aggressively down shift the transmission and literally throw you through the windshield when the brake re-engages. Works extremely well in my opinion.