I too bought the kit at Wal-Mart that came with all the guards and a video. I’ve been using it for about 3-4 years now. I cut my dh hair probably every 4 weeks, as he wears a hard hat while working and it gets very hot where he works. So he wears it pretty short. I used to cut my ds hair, but now that he’s a preteen, he is getting very picky about his hair, so I take him to a local barber who only charges $8. for a cut.