Online Divorce..Is it legal?

Hi,
I'm a first time poster here. I'm about to file for a divorce with my wife of 5 years. Has anyone ever tried that online divorce thing? They claim that you can process a cheap divorce online and it's even a less of a hassle. I included the link so you can check if they are legit. Any suggestions or ideas would really help because I'm not upper class.

Here's the link: Free Divorce and Separation Advice from the Divorce Guide

Thanks