Unpacking attention. Start by opening the package at the bottom, or it does not. Then arm yourself with good scissors and a lot of prudence to cut the blister. What a ridiculous idea to set a blister on all sides, a real dirty trick to open. Fortunately, this fact, the worries are over. The mower comes with two cutting heads. The first, already mounted, enables cutting 0.5 mm without shoe according to instructions. The 2nd is deducted to shave the skull to 0 mm. The head change is very simple and takes only a few seconds. Then adapted to the first cutting head, it has a first shoe for cutting 1 to 3 mm, and a 2nd for those of 3 to 15 mm. The selection of the cutting height is done by turning the big wheel on the base, and by varying the height of 2 mm 2. It's simple, practical and effective. I could use the trimmer immediately because she was already loaded, nice. I thought the pivoting shaving head was a gadget, it is not. When you get his cut yourself, it's a real advantage. The head pivots in the notches 180 ° which allows use both 2 sides of the head, and that one is left or right handed. The grip is excellent and it is not very noisy. The quality of the cut is perfect, but it may take several stint with the big shoe (for a cut to 11-13 mm), the grooves are too wide. It's good to vent the hair, to guide less (hard to find a good compromise). Anyway, this is the first time I managed to cut my own hair. My wife helped me to finish behind the skull and there, it has not found practical grip at all compared to our conventional mower which demonstrates that ergonomics has been studied for "shave your own head "as indicated on the package. Finally, the heads are cleaned directly under the tap water, it is convenient. A bottle of lubricant to use every 3 months is provided, and a brush and a storage bag. I take a star for tedious to open the blister and the still high price for a lawn mower.