Like 96 Speed said, once you have one, you'll never go back to a static plate. I have a 10" Atlas, and can really fine tune it on the fly to squeeze that last mph out of the boat. I know it's a Ranger - slow bla bla bla -whatever. But where they really shine is in rough water. I bury my motor and then trim up to keep the nose on top of big waves. It really makes a difference. It is also nice in real skinny water. You can put it up, and keep the motor down more on the trim, and idle with it pushing 'forward' rather than down.
If you have a jackplate set up for your optimum speed, your motor will blow out bad in rough water. I had a Skeeter set-up for fly back in the 90's and almost tragically found out it wouldn't stay hooked in the bad stuff. Had to move it down out of caution. Static plates are nice, but hydraulic are much better.
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Ranger Z520 250ProXS