Very easy to install the handle and polishing disk. As with some of the reviews it bogs down if you put too much pressure on it. If you are a beginner like me that is great. Back off the pressure and let the machine do the work. There is no way I can damage the paint by putting too much pressure on it. First time using one so I used my wife's car as a test. Her car turned out great. Now I'll use it on my high end Luxury car now that I have some confidence.