H B.

I was forced to work with Payoneer because the client I was working with insisted I use their payment system.
From the beginning, it was unclear whether the same fees and exchange rate structure outlined on the site would apply to these payments or not, as my client clearly has an extensive arrangement with Payoneer. That remains unclear, even after payment has been made. I feel I wouldn't understand the true costs of conversion until after having eaten all the fees.
I set up a USD Payoneer account, since it was an American client. The client then paid in EUR, but it wasn't possible to add my EUR bank account to the USD Payoneer account I'd already created -- even though there are clearly three separate currency balances within my Payoneer account! Instead, I was given the option to add a prepaid EUR MasterCard to my Payoneer account and pay $3-something each time I attempted to use the card.
Color me very disappointed that Payoneer is unable to accommodate internationals with bank accounts in separate currencies. I still don't understand why they don't allow withdrawals without conversion (and conversion fees) if I have the means to do so.
For this reason, I wouldn't recommend Payoneer over any other international payment transfer option available today.