Since implementing the PayPal payment option in addition to Google Checkout, our cart abandonment rate has dropped from about 53% to 45%.
From June 4-14, we had 3340 Unique visitors from 102 countries with a bounce rate of 46%. About 1/3 of them actually looked at an item for purchase. There were 244 unique views of the shopping cart page, which approximates 244 different people putting things into their shopping cart. 223 of them proceeded to click on checkout button. 123 people actually completed the checkout process to buy something. For this period, our checkout abandonment rate was 45%.