Hello, I had the AEV2" leveling kit for about a year. I had no issues with it at all.
No change in ride and was easy to install. I recently just replaced it with a 2" Synergy progressive lift and Bilstein 5100 shocks ( which lifted my jeep just over 3" in the front and 3" in the back )
still no issues, and rides great.
But the AEV leveling kit did what it needs to - takes the rake out bringing the front up 2inches and the back 1.25"
The only reason I changed the lift was because I wanted new shocks ( to help the ride with the 33's, and incase I get 35's when they wear out )
hope this helps, let me know if you need any more info..