Thanks for your response. I know what the website says -- just curious what the reality is. I had a horrible experience at Frankfurt. It was a zoo changing terminals, transitting the tunnel, thru the mob at security, running to the gate only to find out I just made the last shuttle to be bussed out onto the tarmac with a short connection.
I know Dusseldorf isn't the size of Frankfurt, but I would like to get a feeling from someone who's been there, done that, got the t-shirt.