Coremelt review for Beast Currency Converter

This is a great currency converter except that it's getting mid market rates from Xe.com. This is a problem since the actual rate the customer pays is ALWAYS much worse than this, it should be using buy rates for US dollars from each currency, not a mid market rate. On a $200 purchase it can be off as much as $8 which has lead to customer complaints. If they fix this and allow a margin entered by the store or use realistic rates I'd give it five stars. As it is we have to find another solution.