I did the daystar lift without replacing the rear springs but i did replace all the struts and front coils and the truck is squatting in the rear. So I would suggest replacing rear springs too.
Did a big overhaul this weekend which included, wheel spacers, new struts along with daystar leveling kit, front calipers, rotors and pads with fluid flush.
I like the android unit a lot. The price, quality and features are a no brainer for the price point. The OEM fitment and style are the main reason I used this unit.