The front springs actually give you about 6" of lift. They are stiff, but work well for me as I intend to add a winch at some point. I was disappointed in that two of the front shocks (factory quad mount) were the wrong size. I kept them for spares.
I did not use the blocks, did a shackle flip (ORD) and used zero rates to make up the difference.
The installation was simple on the front and I highly recommend the ORD flip for the rear.
Also no brake extensions (I got NAPA extensions) or steering correction.
I paid about $300 for the kit including two extra shocks and the steering arm, including shipping, on eBay which is why I decided to try it out.