I got um and I like um. Changed with my spring install, so not sure what they would be like by themselves. I've read that the premiums are equal to a 3 setting on the Illuminas. My suspension is much more responsive and more stiff than stock.
I have them but I added them when I changed my springs so I don't know how much of what I'm feeling is the springs or the shocks. What I feel is a much more responsive setup that gave me a better feel for the road. I'm very happy with them.