If you like a photographer's editing, you can replicate it quickly by buying one of their presets, but how much are you going to learn as a result, and what are you going to achieve by replicating their look and feel? Sure, you can use the preset as a base from which to start, and you can begin figuring out how certain looks are achieved by digging into the various settings, but that time might easily be spent doing a few tutorials, developing your own style, and establishing a better understanding of the editing process.
As a result, your future images will have more potential when you go on to apply your newly acquired knowledge.
Having still not bought a preset, I'm interested to find out about the community's experience.
