I recently purchased this for my Kool Koat HD. I was having issues with the hoppers, so I thought I'd give this a try. WHAT A DIFFERENCE! Now, I'm not gonna sit here and blow powder up your butt, it took some fine tuning to dial it in. But once it was...it truly made a world of difference. I've heard some negative things about fluidizers. "They don't work right. "I didn't see a difference." and so on. As for me, this made ALL the difference! So much so, that I'm probably going to buy one or two more for my shop. Totally worth it. If you get one, just have patience and dial it in. Once you do, I don't think you'll regret it.