I installed this kit on my 2004 GX470 about 3 months ago. I have been super happy with it, it's got really comfy shocks, high quality bushings, and rides really cushy, maybe even cushier than the airbag system.
My setup: 2" front light load springs, 2" rear light load springs, both in turquoise. Black Dobinson's shocks/struts.
I originally ordered the Dobinson's airbag delete kit, but it raises the rear an additional 1.25" over stock, creating way too much lift in the back. It was nearly impossible to get the springs installed, and it was riding crazy high. Recommend AllDog's mount instead which gives actual spring height.
The only down side: The front springs have settled to around .5-1" above stock ride height. Still looks OK, but has a little rake. Consider medium springs instead of light for this kit. I can't say how that will impact ride.