The advantage of this version is the battery that bcp loads more quickly than the lower models and are thus almost unusable everyday unless you can let the mower charge throughout the day after each use. By cons, it is true that the design of height adjustment made by a very small flexible plastic claw is reviewed. Especially since he must remove this plastic shoe to use other accessories because it attaches to the trimmer body and not on the head it surrounds and blocks. And this too fragile attachment is already showing signs of weakness after 1 month of use, which can result in a change cutting height annoying if one has the misfortune to press too hard on the face. Result: I disassembled the more afraid of breaking and thus uses more other accessories ... has this, the mower is effective.