I just did one of these transactions. A straight forward domain purchase. I had a faulty transfer code, AND it was not clear which payment method I was supposed to use for my USD debit card to make the payment (I don't live in the US). I only had 2 choices, neither seemed appropriate. This was the second time within a month I had to use this method of payment.
Sedo communications were tought. No weekends and 2 days minimum replies. And replies didn't always answer the questions asked. It was a nightmare. Took about 2 weeks to get the domain transferred.
It definitely would not be my first option of paying for a transfer.
Name Trader - Stu