Received my copy of To Ur is Human yesterday. On first read through it is interesting.
I bought it to try out with the slightly later biblical armies, the Hittites, Assyrians, Egyptian's and the few Syrian/Hebrew chariots I have.
I like the idea of the fear factor. And the riding down of troops in the way of a charge by chariots. It sounds awfully like what nobles would do.
The use of 4 bases per unit isn't exactly my taste, as it wasn't with Neil Thomas' One hour Wargames and Ancient and Medieval Wargames.. I'll use paper records for unit casualties. After all, the armies are not large.
But that is on first reading.
Time will decide.