If you pay with your credit card through Paypal, you are protected because if the discs are damaged or missing, you can withhold payment while you pursue a refund. Your credit card company will go to bat for you.
Personally, I don't know this company, sorry. But they do have this written on the site, so I think you are protected:
"Warranty Information
> 30 Day Hassle - Free Returns, Against Damage or Manufactures Defects.
> Satisfaction GUARANTEED all titles are in NEW condition and in the original packaging or your money back.
> We strive to provide Excellent service and high quality products to our customers.
> We fully Guarantee the full functionality of all of our titles.
> Questions or Concerns with your product please contact our Customer Service Team and they will be happy to assist you. "
Clare