I am absolutely over the moon with these lenses. They are extremely comfortable and I use them every day for 8 hours. I love how natural they look in my eyes. No one can tell that I am wearing coloured contact lenses. I didn't want to change my own eye colour massively, just enhance it a little bit. They just slightly enlarge my iris but still looking natural. I will definitely be buying more. I don't think I can substitute them.