While you do give up some speed since you need to move the box to the perfect spot, you’ll end up getting sharper photos in the end, where the camera focuses on the subject instead of its surroundings.
The option I prefer is a small autofocus box that you can position across the frame. Whatever it’s called on your camera, the key is that the camera will focus on whatever is in the little box. While you do give up some speed since you need to move the box to the perfect spot, you’ll end up getting sharper photos in the end, where the camera focuses on the subject instead of its surroundings.