I have one and absolutely could not live without it, I think.
Which iPad do you have?
In order to get it registered and started you have to download iTunes on your computer and then open iTunes on your computer, then plug your iPad in to your computer. Then follow the directions provided. There is a manual that you can download, too. I downloaded it to my computer and then read it on my computer and do it on my iPad. Also there are a couple of iPad groups on Yahoo Groups where you can get lots of info for your iPad