Hey guys, just wanted to share my experience as well and perhaps fishing for advice.
Had bils installed @ 2.1 at my local 4x4 shop. Very knowledgeable mechanic with 30+ years experience. Had to wait a week for alignment but given roads here in SW Ontario were very wet/snowy/slushy all week, -5 to -10 degrees celsius, and the low KM's I drive daily, low risk to tire wear.
Initial couple days, found ride heights out of whack. Driver side was exactly level, passenger side still had over 1.5 inches of rake. After about a week, everything seemed to settle and now I have the typical 0.75 inches of rake on both sides (PERFECT).
Front passenger side was badly out of alignment and was corrected as well as a minor correction on driver side.
My only issue is the ride quality just like the OP mentioned. I wouldn't go as far as calling it "rough", but its definitely stiffer. That being said, the reduced body roll in the corners is amazing. However, any imperfections in the pavement are felt in detail, especially through the accelerator pedal. Depending on the shape of the bump, there is almost a light "pop" sound now coming from the front end that I'm fairly certain wasn't there before. Its not loud, but its definitely audible and can be felt.
I called the mechanic and asked if there "is any possibility" that the top nut has let off and become loose but he advised "No", it was torqued and tight as hell when he buttoned it all back together. I imagine the ride would be much worse if the spring seat was installed improperly.
Can anyone else relate to this / any advice? I would like to check the nuts myself but cant really figure out how exactly.
Any help is appreciated!!!