Thanks! I started using it after our teacher suggested to do so, because it's easy to "filter" in photoshop (there's a specific blue filter). So if you create your sketch in blue and then you trace it in black, you can easily delete the blue part. Red is another color that is easy to filter, but I preferred blue since is one of my favourite color! After that I got accustomed to use it and even drawing with a pencil it doesn't look the same to me! I think it gives something more!