I bought these in Clear (because black was sold out) but they were easy to put on the clusters. (Used on N4) Very sticky and you need to be sure not to touch them with anything like your fingers because they will stick to your fingers and come off and ruin your cluster. Once on, they adhere really well. I had these on for four days. I think they would have stayed longer if I decided to keep them on. They were visible with the N4's but I think with a more voluminous cluster near the spines these would be invisible. The sparseness of the N4 also made my lashes sticky to my bottom lashes with the Dashes. I think it wouldn't be a problem with a fuller cluster though. The Dashes removed so easily off my natural lash and off the clusters with a few drops of lash remover and best of all, no damage. My lashes are thin and sparse, and with lash glues a few days will damage them. I've tried all the brands. I had no issues with damage at all with Dashes. They were easy and fast to put on, and just as easy to take off and clean my clusters. Great retention for me and no damage. I can't wait to try the black! Please don't stop making these!