Review (5/5): Very close shave
I found that shaving against the grain on the neck and sides of the face gives me the closest shave I've ever had. It's completely smooth. Since it's so close, be a little bit careful. It gives the close shave of a regular safety razor but with a much lower risk of cuts.
However, I found that shaving against the grain around the lips and chin causes skin irritation. Just shave with the grain in those areas.
The blades last a long time and are cheap to replace.