Is anyone else trying to get an iPhone 5s?

I've been checking the site every day almost every 30 minutes for three days. I recently started using a browser plugin to check that iPhone availability checker site every 10 seconds. I leave the checkout window open, ready to go, and every time a phone comes up as available, when I click "place order", the availability checker updates itself to show that the phone is gone, but my purchase doesn't go through. It's suddenly out of stock. It happened to me three times already.

Is anyone else having a hard time with this?