Supertuning isn't necessarily an upgrade, as much as a refinement. Casting distance may increase slightly, but casting ease will be greatly improved. That is, same distance with less efort. Retrieve will be more connected and much smoother. The drag washers are the biggest upgrade. It will start easier, pull smoother, and have a higher stopping power; over a stock drag. Whether it's worth it, is up to you. Most newer reels are plenty good enough, but if you want your reel to be a little better, Supertuning is a relatively cheap way to improve it.