This Review Title is Bad design and the content is: While the concept of the built in comb is a good one, this design just does not work well and don't count on the vacuum catching all your clippings because it can only hold about half the volume of a shot glass. I ended throwing mine away and switching back to my old Oster hair clippers with the snap on combs for my head and bought a small rechargeable Waring beard trimmer. The twist dial for the comb length on this unit can be wrong - I gouged my beard/sideburns once with this unit. The comb unit must be removed for frequent cleaning and putting it back on correctly takes a delicate touch. The large size of the unit and comb also makes it verr difficult to trim your moustache close to your nose. Don't waste your money..There are other information for this review, one is This reviewer did not purchase it and the other is 1 people think this review is helpful.