You get what you pay for. I know you are tight on cash (who isn't nowadays) but I wouldn't go for it. I'm sure your rear leafs are saggy, so add-a-leafs won't give you the full lift they claim. You should also upgrade your shocks when you lift, and that kit doesn't have any.
Save your money and get a full kit with leaf packs. I'm sure this lift would be terrible on the road, and not very capable off.
Sorry, I see you are upgrading your shocks too.
The pic they have posted and the description of items included is very different... for that price I'm sure all you get is the add-a-leaf and front springs.
2001 Jeep Cherokee Sport
3" Rusty's lift/1 1/4 front pucks/Rusty's adjustable trac bar/JKS quick disconnect swaybar links/15*8 MT Sidebiter wheels w/ 31" BFGs/Flowmaster 40 series muffler/K&N intake