I was attracted by the AWS free tier to give EC2/S3 a try. However, one thing I'm worried about is the payment process. There's quite a few management menus and it doesn't seem entirely transparent when I would break the free usage tier (or if I decide to pay, when I break that usage tier).
You can download .csv usage reports, but I wish the billing/usage monitoring was a little more interactive so I don't get unpleasantly surprised. Does anyone have experiences EC2, is there some aspect of the management interface that makes this a easier/less worrisome?