I just did mine with the eibach springs last week. Snap ring is set to the lowest but I'm about a quarter inch higher in the front. Think I will add an inch to the rear as well.
The ride is stiffer but a lot more controlled. I noticed my truck didn't feel like it was going to skip off the trails while out in the woods last weekend. Steering also feels smother and in less of a bind as opposed to a spacer kit. I think this is the way to go for a level and replacement shocks unless you have the cash for fox, king, etc....