scottjim, I looked at the website and couldn't find any contact telephone numbers, physical address or any other connection to mother earth
That's not a good sign, but it doesn't mean that it is an unreliable company!
If I were you, I'd exchange 1 unit and see how that goes. Be sure that whenever you use a credit card online, that you have the fraud protection plan from your bank on that card. You never know with who you are dealing.
Good luck!