I regularly use this liner. Whenever, I go out apply it and it has no side effects. It is long lasting and adds beauty to my face. Being a working lady I use it daily. It is easy to apply and needs no extra efforts. There is a brush inside this eyeliner which is used to apply it. My one bottle lasts for long time and it is reasonable and is in my budget. Thanx to Lakme for making such a nice product.