So far I had about 6 years the predecessor of Remington MB320C. Meanwhile, the failed battery. But I was convinced of the good references for durability of the battery in the MB4030 and MB4030 now bought this newer model. I can indeed about the durability of the battery today anything statements, but the quality of cutting. This is in fact not as good as the MB3020. The tines of the great essay are so dense that the whiskers essay afflict inside quickly. The essay must therefore often be removed and cleaned. The shear angle is to this equipment so inconvenient (so blunt) that you have to take an almost 90% shearing position against the skin when cutting - this is unusual. The short essay (for beard length at 3mm) I can not use because can almost do not cut the beard with this paper; so I suppose the big top, put it on a level w2 and get a 3mm-Bart.