Once you have jumped through all of the hoops and finally have a payment processed, the next step is to, of course, have the money transferred to your bank account where you can access it. Google only initiates these payouts on business days, which for some reason in the Google universe not only excludes the weekends but Thursdays and Fridays as well. Which means if you can not process a payment by Wednesday, it will sit in the que several days before you can actually access your money.
Given the slow processing time, confusing set up, and poor navigation I would recommend using one of the other payment services, such as PayPal and to avoid this one whenever possible. To learn more about payment gateways and alternatives to Google's checkout service check out the following articles:
How to Use PayPal to Collect Payments
Small Business Web Hosting Options
A Review of PayPal
What Are Payment Gateways and How Can You Use Them on Your Site?