I was originally looking at the 4 E's 5600rpm shaker or the Vevor 6000rpm paint shakers. This particular one came up on sale and I figured it had to do better than my cheap nail polish shaker, right? Oh yeah, it has! This thing shakes my Citadel, Army Painter, Vallejo, and Scale 75 paints FAST! Then I tried putting some shaker balls in the bottles.....color me impressed! The only ones I have problems with are the ink bottles with the rubber dropper tops. Once you find the right place to hold them though it makes short work of even the ones you haven't used in a good year or more lol