I loved this campaign. One of the best stories and creativity I have seen yet. However this great campaign has some flaws.
First flaw I saw was the spelling/grammar. Its a small flaw but it corrups the instructions as to what to do. The next flaw was the map design. The first map was great, but it was a water map, so not much detail had to go into it. However the next couple of maps were land based. The immediate area around the map was ok, you tend to be surrounded by forest and plenty of resources avalible to be a mole (a person who just sits behind their defenses and builds up, then attacks). Also, once you venture out past the protection of your base their tended to be not much at all. So basicaly the maps looked like they were slapped together.
After all of that, the maps were a good design and the playability was great. The balance was good too. It was tough to fight off the many hords of vikings that came at you when you attacked.
As I said, I loved the story. The story itself is not that interesting (vikings take over England) however the storyline was very well thought out. Each mission had a great goal that one had to achieve.
As a total I loved the campaign, compared to the others I have played. Its fun to play and very entertaining. I suggest you take the time to download this one.