I tried Ancestor's Legacy. I hated it. The UI and pathing and combat are all mediocre, and the story is tedious and nonsensical, for example:
You are breaching a city so you open a hole in the wall. Instead of fighting you at their clear defensive point, they decide that the best course of action for their 30-something units, was to each hide in an individual house and "ambush" you when you pass by. So it turns into you killing a couple of squads, waiting until you are healed, taking a step forward, and killing another 2 squads. Over. And over. And over again.
Play it if you really really want a medieval RTS, but you are probably going to be disappointed.