Don't ever do it!
I have tried this twice, separated by 2 years. Never again. I suspect this is contracted out by Amazon to a 3rd party. The difficulties when this fails (always) are huge compared to any other Amazon product I have ever bought - and that is thousands. You will get buried in the minutia of Amazon that you never knew existed and is seemingly designed to spew frustration on the customer. You might get your money back but you will pay an emotional price. While the emailed gift cards lack a certain intimacy they do seem to work.<br />Rewrite: This was way too positive.  They actually stole the money from me.<br /><br />In other interactions with Amazon that fail one can at least see the failure and often see that Amazon is trying to be helpful - even when they fail to do so. With this product it is totally opaque. There is some glitch in their software, specific to this product, that will cause endless frustration.
Rating: 1 stars