As has been previously stated, it's ONLY a deal IF you payoff the debt before the promo period ends (I think they are running no pay, no int. for 6 mos. on $500 purchase). What you to remember is that the interest accrues from the purchase date and gets added on IN FULL (regardless of how much you've paid down the debt) at the end of the offer period if the balance isn't paid in full.
Some other things I like about the NewEgg card are some of the other promos they run (like free "rush" processing) and the fact that it seems they are much more willing to applied credits to the card balance.