I use my center tab for planning help and slow cruising.
calm waters I can plane down to under 25

impossible without the tab

getting on plane is a breeze as well.
I have used it in rougher waters to gain flatter control of the boat.
test and retest is the best for live conditions.
best thing to remember, and this is for any tab use, just a touch of the button at a time!!!!! it takes time for your boat to gain the feel of tab movement, and on a cat packing in the air really can cause quick havoc if using too much tab to quickly