I use this to mix paints for miniatures. Typically Citadel paints. Sometimes, paints separate heavily over long periods of time. This saves a lot of time and energy otherwise spent shaking the bottle back and forth. I find it is especially effective for mixing separated metallic paints.It's also pretty small. Smaller than the pictures make it seem. It's easy to put on my desk, even if the desk is crowded.I notice other people say it doesn't work. If it doesn't work, your paint is either beyond saving or you aren't keeping it on the mixer long enough.Some people say it takes a while. For some paints it does. But shaking a bottle for 4 minutes straight is awful, and just keeping your finger on the bottom of the upside-down paint bottle for 4 minutes while you watch YouTube is nothing. And, based on my side-to-side comparison, the result is a smoother and more homogenous result when using the Vortex than by vigorous hand-shaking.I wondered when I bought this if I was buying something stupid.I'm glad I got it. And if you spend more than 2 minutes of your week shaking paints, you should too.