Creating an account is not obligatory. However, it won't cost you anything and it is most certainly handy. If you have an account you will only have to fill in your personal details once. Every next order your address details will appear automatically.
Worried you'll lose your password? Don't be! We'll send you a confirmation email after registering with your password, and if need be you can always generate a new one by clicking 'Forgot password' when logging in.