just bought the 220-601 and 602, but there is a catch. I called them up, and was told you need to download a rebate form, mail it in to them, and then they mail you back a giftcard to buy the actual voucher from their website. ETA to receive the gift card is 4-6 weeks, and then after purchasing the voucher, they have to mail it to you.
So while a great deal, dont expect to take your exam in 2 weeks.