Stronghold is a nice strategy game which unfortunately suffers from some flaws that prevent it from being enjoyable for a very long time. The economy aspect is nice and balanced, however, the combat system is not, and you'll find yourself often cursing at the fact that a bunch of simple spearmen and other footfolk can tear down a stone wall of your beautiful and tideously created castle in a matter of ten seconds.
This and the fact that the voice replies of the in-game units become quickly annoying, somewhat stains the whole experience of, what would have been otherwise a very fun and satisfying gaming experience.
That said, te cutscenes of the single-player campaign, as well as the story itself are quite entertaining, and the difficulty curve is such, that you rarely find yourself being frustrated.
All in all recommended, considering the price.