Wordpress - Get all products with a custom attribute

OK I HAVE ALREADY!! yuhuuu!

Thanks a lot guys!!

I have this:

$args = array ( 
     'post_type'  => 'product',
     'posts_per_page'  => -1,
     'meta_query' => array( 
         array( 
          'value' => 'demo', 
          'compare' => 'like'
         ), 
       ),
     ); 

Well this works at least for me

Thanks thanks!!

Best regards!