Working on docs.

Author: taylorotwell

billing.md

@@ -78,11 +78,13 @@ If your plan has a trial period that is **not** configured in Stripe, you must s
 
 	$user->save();
 
-If you want to pass additional customer details supported by Stripe, you can do so by passing them as second argument to `create` method:
+If you would like to specify additional customer details, you may do so by passing them as second argument to the `create` method:
 
-	$user->subscription('monthly')->create($creditCardToken, ['email' => Auth::user()->email, 'description' => 'Great customer']);
+	$user->subscription('monthly')->create($creditCardToken, [
+		'email' => $email, 'description' => 'Our First Customer'
+	]);
 
-Refer to "Create Customer" section of the Stripe API to see which fields are supported: https://stripe.com/docs/api#create_customer
+To learn more about the additional fields supported by Stripe, check out Stripe's [documentation on customer creation](https://stripe.com/docs/api#create_customer).
 
 <a name="no-card-up-front"></a>
 ## No Card Up Front