Review (1/5): Not for precision.
How in the world does this thing get 5 stars? The adjustable trimmer doesn't 'snap' when adjusting to number 2 trim. It also silently switches from trim number 3 - 2 if you press down hard enough. Also the blade has a 'shield' that aids in sucking the cut hair down into the collection chamber. The problem is the 'shield' blocks the head of the blade. Very dangerous if your cutting a line for your moustache-- your literally cutting blind. It does come with a cheap attachment for linings, but I prefer cutting from the blade, like in the older models.
Too much of my life depends on how good of a shave I give myself. This time Norelco doesn't cut it. The one star is for the vacuum.