Is wimdu.com a good website?

I had just recently tried to book a room through wimdu.com and got a message from my bank saying that my card was charged $400.40 from a souvenir and gift shop within 5 minutes of submitting my request. The room the tried to book was $400. I had looked online and didn't find anything negative about this site. However, I didn't find anything positive either, except on yahoo.com, [ a href="http://news.yahoo.com/s/prweb/20110528/bs_prweb/prweb8497509"http://news.yahoo.com/s/prweb/20110528/b…/a ]. Does anybody know anything about this site? I'm a little worried now. Thankks!!