I have been trimming my own hair, I found this product on youtube. I was skeptical at first but decided to purchase this. I'm very happy with it. I have long naturally straight hair thats layered, my layers were almost grown out. I watched the instruction videos on youtube for layered cuts and gave it a go.. It took awhile to get used to using it, making sure the bubble is in the middle. I think the instructions on youtube and in the package for using the clip with bubble aligned are confusing, it should be better explained and shown on the instruction videos for each cut and style... I also think this should have came with a dvd of how to use it with different styles, this is why I am giving 4 stars instead of 5..After the confusion,Once I got the hang it was so easy. I admit It was scary to cut my hair using it, uncertain if maybe I may turn out with a nightmare cut..It came out so nice!! I was able to put 3 different level layers into my hair. I actually cut 20 oz of my hair as I went along, I couldnt believe how easy it was. It really looked liked I went to the salon.. I was able to keep my length and give myself layers, at the salon I always say to keep my length but it gets chopped off.... If you cut your hair at home, this is a great product you will want to use. I am going to see how it grows out, I am really considering skipping the salon. If you want the long layered look, have long straight hair this is for you. TIP:: Cut a little at a time as you go.
Update: 2/2012-- I have not been to the salon since ive been using this, i have saved so much money and time. It takes a couple of tried to master using it on your own hair, i simply love it..