Dragon Heart is a light fantasy film with a simple tale. Its plot is pretty straightforward, and in this case, that's a good thing. By no means is this an award-winning film, but it is a fun way to spend two hours.
I don't want to give anything away, because there is a nice reveal at the end, but suffice it to say that you'll be pleased with an easy adventure film with a fair amount of comedy, some nice medieval action, and a generous amount of genuine pathos. The final act is well-written, and the second act moves along at a brisk enough pace. Nothing is dwelt on overlong.
The visual effects were still a few years away from being photorealistic, but decent enough to pull off a CGI dragon. I recommend it, but don't go in expecting the greatest fantasy film you've ever seen.