I can't even begin to describe how insane and unuseful this service is. I wanted to buy a domain name on July 1rst, because a website was having a Fourth of July special. I had only about 20 dollars in my account (just graduated from college, completely broke at the moment) but I needed this site for a portfolio to get work. I went through Google Checkout to pay for it because there was no PayPal option available. I go through the process and I get a confirmation email from google. 2 days go by and it is still a pending transaction and I still don't have a site. I go back to the domain registration and they say they never got it from Google Checkout. They close the account and I try again to re-sign up. This time I notice there is a PayPal option (lord knows I wish I had seen it in the beginning) and I go through PayPal checkout and voila! Brilliant transaction and I had my domain that night. Meanwhile the Google checkoutchard was still pending on the canceled order. TWO WEEKS LATER they bill me finally, sending my account into overdrawn. I contact the site that I registered with and they apologize and issue a refund to Google Checkout. 5 days later, here I am with a 35 dollar overdrawn fee, no response from Google Checkout, and nothing that the website can do.
I WILL NEVER USE GOOGLE CHECKOUT AGAIN. DO NOT RISK IT.