This subject will always return a 50/50 opinion.
These two obviously don't like it

But i think (despite the problems i've had) its the easiest and best way to move money about online for goods.
I've never lost money from it, they shut me down for a week to see i was paying tax and not laundering money, but after that it was back to normal.
It whatever you're comfortable with really. If you plan on making small purchases on Ebay, just send to paypal from the bank what you know you will use. if you get stung, least it won't be thousands, because you're taking it easy.