I had read reviews of people who said they had trouble using it wrong because we could cut if we did not take his time ... And indeed it is a horror! In fact we must always keep the mower parallel to face. The slightest wrong move will cause incorrect because cutting blades that are not protected .... We must be very precise and cautious. Suffice to say that we must spend considerable time and have lots of patience. This is unfortunate because the mower and blades are fine, by against too difficult to shave with ....