Well, it isn't in Stafford, but in Doswell; and yes-thousands have been there.
What do you want to know specifically?
Have you done a search on this forum and looked for Kings Dominion? It is often discussed, as well as Busch Gardens and the debate between the two.
Kings Dominion is very popular and can get very crowded. Try to come on a weekday and get there at opening time to avoid major lines. The two most popular coasters are Volcano and Intimidator which are in the back of the park, head for those first thing, otherwise you're going to have a long wait. Bring sunscreen as there is not a lot of shade at the park. What else would you like to know?