i am not having any issues with them on my Burb.
They were very stiff when i first purchased/installed them, i had to change out my shocks for different design and makes to assist with this, but after a month or so of driving, they had softened up some. they've been on the truck for about 4 years now. no complaints
but still, they were a "firm" ride, so to help with this "firmness" i simply removed one of the lower leaves from the pack,,,it did lower the front anout 1/2 an inch, but the ride is much better, still firm like a 4wd usually is, but hitting speed bumps and whatnot are not so rough where it jars your kidneys around anymore.
and of course i am still using my stock rear springs, WITH two extra leaves added to the pack to assist with the rear sag and whatever.
the Rough Country kit i purchased when i got them were the "EZ-Rides" some people have argued with me that RC doesn't make this style, but i know what i bought when i ordered them.
oh, and they flex real wheel too
for a truck used mainly for offroad use, i would purchase another set, for something that sees alot of street use, go with those others that are mentioned for that soft, cushy ride quality.