I had a JL Tazer mini for the JT, it was straight forward and easy to use. This time around I went with JScan on the JKU. It's a bit more cumbersome in the app than the JT cluster, but overall it seems more customizable and has the benefit of diagnostics. I paid for premium with my VIN.
I had anti-rock on the TJ, it was pretty sweet, but I think this time around I'm going to try disconnects or SwayLoc. I figure the anti-rock is a compromise, sorta disconnected on the road, but sorta connected offroad. Although I never really like my JKS disconnects.