Unfortunately, I'm one of the folks who happens to have incompatible hardware... which you will never know from the box. You can meet all the system requirements, and in fact have a very fast, new computer that works well on all of the newest games, but you might have hidden hardware that is not compatible.
For example, I have a Gigabyte motherboard. It has onboard sound by Realtek. So do many Sony, Dell, Acer, Gateway, and Futjitsu computers. Dragon Naturally Speaking does not work with the Dell, Acer, Gateway and other computers that have Realtek audio.
And if you buy Nuance software and can't use it on your computer, you are out of luck. You've just wasted $200 of your hard-earned cash.
You can also throw good money after bad by trying to buy and install a new sound card, or a different kind of headset from the approved one that came in the box, and cross your fingers and hope it works. But no guarantees you haven't just wasted more of your money.
Also, their technical support costs money and is a joke, in that they just read from a script and speak in barely intelligible and heavily accented English. And it's really the luck of the draw if you get one that's respectful or one that's angry and disrespectful. I've had both.
Save your money and use the Windows Speech Recognition that comes with your operating system. It's free for all Windows 7 and 8 users.