I tried it for the first time with my Glock 27. Did the normal take down, barrel, slide, guiderod/spring assembly, frame with trigger assembly still attached. Filled the ultrasonic cleaner with Hoppes #9, enough to cover all the parts and cleaned them for 6 minutes. The frame/trigger assembly was cleaner than it ever was as was the slide. I did the barrel for 3 more minutes and used only about 5 patches to get it shiny clean. Used canned air to blow out the excess Hoppes, rubbed all the parts down with a pre=lubed gun wipe, and added a dab of gun oil on the slide mating surfaces. I don't think my G27 has ever been cleaner. I am going to try the Hornady gun cleaning solution next to see how well that works.