Never even heard of it until just now...or that Nutaku took payments from it.

I go by paypal and just live with the extra $5 charge per transaction (I purchase by the hundreds to minimize fees) and with paypal it's pretty instant.

One thing I will say though, make sure when you went through the payment screens that you navigated ALL THE WAY to the home page without ever actually hitting the usual "home page" links, such as the Nutaku logo on the top-left. I remember back when I made credit card payments that there was one little part just after making payment that is actually the "review" section where you're supposed to hit the button one more time to finalize everything, only it's not labeled as the review section and looks like everything's done and done. Once made the mistake of thinking I finished the transaction right there when I actually had not, took a few days for the $100 ghost payment to clear itself up.