The definitive way to experience a significant portion of the original Age of Empires campaign. Sure, the building logic and balance of the first one aren't as good as the second, but just using the engine from 2 already improves everything by 300%. The completely new campaigns are also very good, and I believe that here is a good compromise between using the content from the first game and modernizing it enough to be tolerable.

Of course, it would have been better if all the original campaigns had been ported, but at least not much was lost. And 30 hours for the low price they charge for this DLC nowadays is more than worthwhile.