I haven't bought one, but I know their splendid return policy is different for computers than other stuff like tv's.
But Costco doesn't do anything to the laptops. They get it from HP. And then sell it to you. They don't open it up or anything.
The only difference is that you are buying it from costco, not directly from hp or getting it from Best Buy.
I don't think costco offers accidental damage/handling plans, if you plan on insuring it.
But if you're an executive member, you can save 2%
not like it is that significant...