Been using MB for sometime... no major complaints so far.
The only issue I have with them is that they dont' have local banks in USA and Asia to do local transfers (uploads). The only option for those outside the EU is to do an international wire transfer to their german bank. You can use credit cards from anywhere though.
But overall their rates are pretty good and witdrawals to accounts have been timely (upto now )
I suppose you could look at Ikobo, YowCow, Firepay, eGold etc etc... there are so many that would pop up on a Google search.
I do not endorse any particular option here, I think it all depends on your business, location, volume and many other factors.
My personal experience is that the largest players like PayPal are eventually the best, safest and most popular option (for your customers as well) unless you are into the more grey areas of acceptable use.
MoneyBookers is a perfect (cheap/fast) way for sending eMoney in EUROPE. Have been using it for 2 years now. Also works in EU countries that PayPal doesn't support. For the rest of the world the application is somewhat limited - so to say there are better options.
If you add a Credit Card you can make payments of up to 1217.20 USD per 60 days with Moneybookers - funded from that CC...
I have used PayPal for years successfully both to send and receive payments. I recently signed with a webhost who requested that I use Moneybookers. That has turned out to be a serious nightmare. While Moneybookers does offer a customer service contact number and email address, the number is an overseas number (London) with no toll-free option. Email sent to their customer service address seems to go nowhere - no response whatsoever. I had funded my account so that I could pay that hosting bill, only to find that any action I try to do - send a payment, request funds - requires a date of birth, and that is apparently not on file.
On the flip side, any time I have had to use PayPal's toll free number, I have had the problem resolved within minutes. As PayPal does serve the countries I need to work with, I will stay with them. They may cost a fraction more, but good, prompt customer service is priceless.