I agree with the reviewer that stated that this clipper has some design flaws that make it a poor choice for trimming. The zoom dial adjusts by itself even with the slightest pressure while trimming giving an uneven cut and closer trim than was desired. It needs to have a setting lock or the dial in a different location than right where you hold it. The vaccum function is so-so, I could live without it. Noise level is unusually high, but that's least of my concerns.