Good addition to your hair clipping arsenal
For those who want to just trim the crown, this is the combo to buy. Only gave it a 4 rating since the #12 attachment really flexes and can cut shorter than expected, so don't apply too much pressure like you do with shorter attachments. The #10 flexes as well, but not nearly as much.  BOTH, however, fit a bit loose on the clipper so they rattle a bit (specially the #12)--sticking some tape on the attachment fixes this rattle. Overall, still very usable and you don't have to get a crew cut every time. It still beats having to pay for a cut at the barbers.
Rating: 4 stars