3 leaf progressive aal kit?

I was looking into just getting a 1.5 aal for the back but I saw on Wheelers offroad a 3 leaf progressive kit for about $150. I was just wondering if that would be the best longterm route and give me the best ride. I also want to know how you install it, is it just like installing a single aal or does it replace the leaf pack. - Thanks

 

It replaces your overload leaf. (Bottom Leaf)
And it gives you better ride for off road. But it decreases your Pay load a little.

 

Or it can be installed with the overload leaf....

 

would this be a good option if my stock leaf springs are sagging a little because i dont think an aal will work for me and i really dont have the money for a new leaf set

 

I had kind of the same question. Since my leafs are sagging will I get more than 1.5" if I did just the add a leaf and no overload?

 

Icon 3-leaf installed with overload:

 

is there any benefit of keeping the overload spring.