There is no details page for a transaction and you can only see the item that was sold in a CSS popup that disappears when you mouse away, making it impossible to copy-paste.
And then there's the fact that their calculations can be off sometimes. We have some sales that are € 12.75. The transaction costs for that is € 0.44 or € 0.45, I don't know which: the amount field says it's € 0.44, but our balance is actually decreased by € 0.45. That's a rather bad mistake to make as a payment provider...
All in all I'm not too happy with Moneybookers. It gets us money and it's cheap, but it's perfectly clear why they are cheap...
Edit: Also, Moneybookers sales were less than 5% of the Paypal sales...
Also MB has some security advantages. You can already notice on the front end (captcha etc.)
Paypal really is much more polished. Their reporting is top-notch. They have an API. And they have an interface which doesn't confuse me. It's not perfect, but it's a lot better than MB...