I purchased a miner for them before I did much research. After reading a similar thread to this I decided I should ask for a refund. They refunded me about 24 hours after my request. To me this shows legitimacy. If they were planning to scam I doubt they would be willing to refund customers. So I've done a bit more research and I have talked to them on the phone. They sounded extremely professional and knowledgeable about BTC and mining, from what I could tell. Although they have a private WHOIS, I know that many registrars and hosting providers offer private WHOIS as a "bonus" for free, so I don't think this is too much of a problem. I think I am going to purchase a Beta miner from them and hope for the best.
This is just my two cents though, I would suggest you do your own research before making a decision.