Celebrity has a long section on their website that explains what they consider the benefits to be. They don’t appear to be doing much more than a travel agent function. It’s not like they can somehow magically get you to your destination if your flight is cancelled. They are at the mercy of the airlines, just like us. I would definitely consider insurance as it covers many things, not just flight cancellations. Never used it since I didn’t find the prices any better and they wouldn’t guarantee my wife and I would be seated together.