I wouldn't bother actually, just more steps to go through ... I suppose its safer to use MoneyBookers for small value trades. But otherwise always just use PA or find a highly trusted user.
It's not any harder to chargeback on Moneybookers than it is on PayPal, all you need to do is call your credit card provider, however it's not as easy to file a dispute on Moneybookers since you need to call them and have a valid reason for the dispute.