I have discovered that leave-in conditioner is a total waste of money and just another product that beauty product companies package all fancy and make you feel like you need it.
Here is what I do: while my hair is still wet after the shower, I put just a little bit of just regular conditioner through my hair and don't rinse it out. It really makes my hair shinier and softer. This is fantastic for curly hair. Try it and let me know what you think.