Ok I have literally had these in for 7 months!!!! And I am remiving and rplacing them for the first time. Over the last 7 months I have lost maybe 5 strands total. Every other one is still in my hair and they are greatI want to add a little too my review that could maybe help those that are struggling with this. I learned a few important things they don't mention about using this. First off.. you have to make sure the openings of the little metal things that stay in your hair are facing outward towards where the opening is on the installment tool. This is the only way your hair ends up inside wedged between the plastic piece and the metal. I can't tell you how many times I tried using this only to have them all fall to the ground before I figured this out. So if your having little luck with them be sure that the openings line up. I'll take a picture so you can see what I'm saying. So look at my pics. Second when you are going to put them in your hair you have to make sure you have hair in every opening that the gold peices are in. So this isn't very good for doing yourself. You need someone else that can see that your hair is in the right place. If you do those two things I promise you will have much better luck with this and probably love it as much as I do!!