Of course it's not the same, but it's also not incredibly easy. I drove around Phoenix for about 7 hours recently. Definitely not the easiest roads, nor the most considerate drivers. I'm curious to see how these cars will figure out all the weird lane closures, double-lane turn-right-on-red, blind intersections, etc. I almost got creamed turning left near the Heard museum, and there was a bunch of confusing construction downtown. And the highway merging can be... exciting. Not saying it's the most difficult driving in the states, but it's also not the easiest.