I was impressed by the promo videos, but not by the actual product. It doesn't look nearly as good. My biggest disappointment is the ai generated terrain. It's awful. I loaded up a city I know, I expected much better, most buildings doesn't have the right shape or even their height I've seen a lot of multi storey buildings that were just one level here. And they didn't even try to use real world textures. All the buildings in the entire city use the same brownish grey canned texture, which makes it look a kind of north korea, zero variation, zero color. Then there are rivers flowing over bridges. And cars drive underwater, where there is no bridge, cars that seem giant compared to everything else. And the bing aerial imagery is just very lowres and misaligned for the most part. Google earth's ai generated 3D terrain is 100 times closer to reality. I'd actually prefer to fly over that to this. I was struggling to get my bearings things are so off. Plus I noticed a lot of fake light sources just floating in the air, not attached to a building or a light pole.
As for the performance it seemed good enough for me, I definitely didn't notice drops to 10 fps, I played at 3840x1600, but also have 32GB of ram.
But this is the type of game where low fps is not that big of an issue to me.