Killed the Harpy, it was a pain.
The entire map can be completed in an hour.
And Rebe is wrong that it's not interesting for online players - it's very educational.
Of course, the difficult battle at the start against the harpies discourages lazy players, so if you don't want to, use the cheat code to win that battle.
After that, it's very educational, especially for online players, on how to build up your army and, most importantly, how to avoid losing movement points on rough terrain.