I visited Tera's site and went to their FAQ about them: http://www.tera-online.com/content/faq
When I did I was curious about their company Bluehole Studio. They list in text the site to click is www.bluehole.net but ironically the link takes you to www.bluehole.com which is a domain name up for sale. You'd think they'd not make that sort of mistake :P.
Its a Korean company(which makes sense when you see the details on the game).
Overall, Im not really impressed and will give it a miss.