What is your opinion about Heroes IV?

I liked the fourth installment of Heroes. The game became more complex and interesting. It's great that the hero now has a more significant impact; before, it wasn't very noticeable. A distinctive and very good feature is the independent army deployment, which encourages the development of one's own tactics. The following innovations were also very appealing: the caravan and the independent movement of heroes and troops on the map. However, the campaigns weren't very good... I think that Heroes 4 is a successful step forward, while the fifth installment drags it back down...

Added 1 minute ago
The fourth Heroes game quenched my interest in the third (it was thought that no game could do that...).