This is a review for cutting someone else’s hair. I did not use it to cut my own hair. My husband has very thick, salt and pepper hair. It had grown pretty long and really needed to be cut. I have never cut anyone else’s hair with the exception of trimming my own bangs—or when I trimmed bangs and cut long hair straight across the bottom for our daughters when they were small. We looked for clippers first...way too expensive and the shipping was well into next month. I watched lots of videos on YouTube about scissor cutting men’s hair. Nothing looked easy. By chance, I found this on Amazon. I watched the demo a couple of times and showed the demo to my husband. He told me to order it because the cost seemed reasonable and it was advertised to arrive in about 5 days. It arrived 2 days later. I ordered the yellow colored guides because my husband’s hair is too close in color to the gray and black sets that were also offered. I’m really glad I ordered the yellow set because the bright color makes it much easier to see his hair while cutting it. I wanted him to wet his hair first but he didn’t want to. So....I watched the demo a couple more times before I had him sit down on a kitchen chair and began cutting his dry hair. Because I had absolutely no idea what I was doing, I started with the 2 inch guide. Using everyday, basic (inexpensive) 4 inch scissors, I just went for it. I did a quick trim all over his head then switched to the 1.5 inch guide and concentrated on the back of his head and the sides. I kept using gradually smaller guides on the sides and the back of his head until I got the lengths he liked. I kept the hair at the front and the top of his head longer so he could gel and spike it a little. We were both amazed. His layers blended extremely well. It looked perfect. Really. I don’t think he’ll ever need to go back to a salon or barber shop again. If we use this set of tools twice, it will pay for itself. The set comes in a sturdy, reusable, transparent, zip-slide closure bag with a pamphlet that offers some basic instructions and pictures. Each guide has the size imprinted into the plastic. Kind of hard to see but definitely readable and the numbers will not rub off. The (included) comb is large and easy to hold and use. There is a row of openings (like a ladder) that run down part of the comb. The guides have nubbins with hooks on one end that you fit into the openings. Then you slide the guide up ever so slightly upwards in the holes until you hear a locking “click.” Now you’re ready to start cutting. It’s really that easy. Before you cut, make sure that the bottom of the guide rests upright against the scalp and be sure to only cut the hair that is sticking between the teeth of the comb. You start by “scooping” the hair upwards with the comb (like you’re combing your hair against the flow), then you twist your wrist until you align the guide upright against the scalp. Then cut. Repeat process over and over again all over the areas of the head you want to cut. The guides are for placing the comb at an equal distance from the head before every cut you make. You don’t cut hair through the guide itself, you cut the ends of the hair that stick through the teeth of the comb. Watch the demo on Amazon. It was brief and very helpful. I was very nervous before I started my husband’s haircut. After I actually began cutting and I saw how easy it was to do and how accurately the cutting was actually going, I relaxed a lot and cut away. I will have absolutely no hesitation using these guides in the future. Next time I’ll know what guides work best and I won’t have to experiment. Wonderful product: This kit offers a really good selection of sizes. We found it great for cutting hair short as well as for leaving up to 2.5 inch length layers. It’s easy to use. Easy to assemble and to clean (we washed it in the sink). The guides and comb are made of sturdy, heavy plastic and have soft edges. The comb and guides didn’t scratch my husband’s scalp. Everything comes packaged in a thick, transparent reusable pouch with a zip-glide opening. You can take it anywhere...toss it into a suitcase, briefcase or purse, etc. It seems expensive at first glance but (for us) it will definitely pay for itself. I paid full price for this item and I’m offering my own opinions and review after actually using it. Good luck and fearless hair cutting!