I sort of do clicker training, but I only recently started using the actual clicker. For the past year, I've trained all of Jackson's tricks using the marker word "yes!" so the "yes!" is kind of like the sound of the clicker. I finally purchased a clicker and it seems to help Jackson learn things a lot faster. Human voice is never 100% consistent, whereas the clicker is, so if you have good timing and click exactly when the dog does the right thing -- they will get it.