I have strange garage height so I was having trouble clearing the garage door opener, not the door itself , even with just Billies @ 2.8 and 305/55/20 tires. So my truck can only stick its ass or nose in the garage for my repairs. I knew she'd never be a garage queen.
The reason I went 4" instead of 6" was to give my tiny wife, my young kids, and dog an easier time climbing in the truck (but I am 6'3"). Funny thing though, I did the Zone 4", left the Billies at 2.1 and now sit over 6" in the front anyway! So technically I am 6" lift.
I don't regret the height with this Zone/Billies. What I regret is not waiting a little longer and getting the BDS lift. The Zone lift compared to the Billies alone is a rougher ride. Love the height, it is just stiffer all around. BDS is worth it if you can afford it. (offtopic, sorry)