How Can I get my money back ?

[retprogramisto]

PayPal should be safe enough to be used. What's wrong with it in comparison to Escrow?

Paypal requires personal information and bank account to withdraw funds, and can freeze your money at any time for no reason. Just search "paypal froze funds" or "paypal account limited" in google.
Bitcoin doesnt do this, as long as you hold your private keys, the money is yours.
As bitcoin doesnt have chargebacks, use trusted p2p escrow for safe purchases.