Is it professional to bring sample reports to a reporting job interview -

I have a job interview next week as a developer. At this point it is now more interesting than what I'm doing (customer support) and pays better. I have some software that they use, and I was wondering if it looks professional, if I report something from some sample data and take me in the interview or will it be disappointing?

Surely print them and put them in your notebook. If they ask that you have samples of your work, you go there if they do not ask, do not show them and you should never worry about being disappointed.