The take it from your credit card, and when you pay, the seller and buyer get an email right away.
-It's very fast
-It good when you see something you wanted for ages and you don't have money.
- Easy for transactions abroad, like I buy much out of the US.
I get the bill incl shipping cost and I pay and it's done.
I just bought something in Germany, I have to pay by bank, (ok very safe) but all together it takes longer to have my item. It just takes a few days to trsfer the money to Germany. (don't ask why that has to be in 2006)