mini-cart ignores PP_Express 'hide_checkout_button'

A workaround can be as simple as:

$pp_settings = get_option('woocommerce_paypal_express_settings');
	if ($pp_settings['hide_checkout_button'] === 'yes'):
	// - Do not show checkout button

See function woocommerce_paypal_express_checkout_button() for more details.

http://wordpress.org/extend/plugins/woocommerce/