I prefer to use a pressing comb for straightness but as some other ladies mentioned, I don't like the smell you can sometimes get. I have a ceramic flat iron but at this time I am not able to get my hair as straight as I would like to with it.
I think it's a matter of improving upon the technique for me, though. One day, I would love to be able to get my hair straight on my own, with a ceramic iron. I attempted to do it once or twice before but it just took too long and after one hour I had only gotten through 1/4 of my hair and my little arms and hands were worn out. Someday...sigh...