The Welsh and their Celtic warriors are great, more than a match for their neighbours' spearmen when used correctly. Unfortunately their best units don't really get to feature much. I greatly enjoy the VI campaign, even if it is smaller and less complicated than the full campaign. And many of the factions seem varied enough to make it worthwhile attempting playing with a few of them. The Saxons and Mercians are a bit too easy though. Huscarles and Noblemen only have to look in the direction of the enemy to scare the life out them and have them run to the hills in fear.