I have been using the balance kit for the 5 years they have been out! Everytime I pick up a partner rod that doesn't have the kit, I immediatley can tell a difference in comfort and fatique.
Balancing a rod is essential to maximize the sensitivity for jigging, flippin, pitchin and somewhat dragging. It's about fatigue on jerk baits, crankbaits and spinnerbaits. It also reduces fatigue during casting and movement of the rod during presentation.
I use the following method!
I balance each rod to the type of fishing I plan to do with each combo. Let's say my jigging rod for the river. I tie a half ounce jig on the line. I start with a about half the weights in the balance cap and attach it to the rod. Then I hold the rod in my hand making sure the Jig is hanging free! I check the balance and then add or deduct weight based on the feel. I tend to like my vertical jig rods a bit butt heavy since It's an lifting movement.
Bass Jigs, Tubes and grubs are the same process but I tend to balance these with a 1/4 ounce Jig head weight. Reason being is that the drag of the bottom in this process adds resistance to the jod tip during presentation so you might want to be just a little more tip heavy in this case! It helps with keeping in touch with the jig. Too heavy and you will tend to squeeze the rod handle hard during the presentation. This causes loss of sensitivity. Kind of like a golf grip analogy.
Then I move on to my jerk bait rod/Spinnerbait rod. I tie on the average jerk bait. Put about 3/4 of the weight into the cap and repeat the process. My personal preference is tip heavy on a jerk bait since it's a downward motion I want help lifting the butt end of the rod in the motion. The bait hanging free seems to be a good representation of the drag during the actual presentation. The tip being heavy is more about fatigue for these situation than sensitivity or feel.
The key here is that you should always balance a rod used for vertical jigging and pitching with the jig attached since you keeping in touch with the bait during this type of presentation. The weight systems is utilized for reduction of fatigue on other presentations so think about using the weight to help you move the rod easily in the direction you want it to move! Hope this helps!