I have had one for about two months. It's great!! Mine has a Mastercard Logo and since I registered for the premier business account and have at least one ebay auction every three weeks listing PayPal as my preferred form of payment, I get 1.85% interest on my PayPal balance and 1.5% cash back on all Mastercard purchases.
I am slowly getting things such as my monthly MSN bill, cell phone bill, and a few other things to be paid by this card. Also when I have a purchase that I can wait a few days to make, I send the money from my checking account over to the PayPal account and then purchase using that card. I also pay my monthly ebay fees with this card.
Hope this helps!