"My God, it's full of stars!"
I have had this game since the early versions and even then it felt like a shop ready product and not early access, and the new updates have just felt like free DLC.
The screen shots tell the story of the graphics, they are awesome, and the whole game looks like that.
The realism is, well I've never sent a probe to Mars, but it feels pretty bleeding real to me. And the realism is the key to your enjoyment of this title.
If you want fast paced action on a future Mars then move along (I've seen posts saying it's boring, pah!).
If you're like me and absorb yourself into a sim about the current exploration of Mars, with all the slow analysis of rocks and atmosphere and the chance to take photos that look very similar to NASA pics that comes with that then buy this game, clear about a month in your schedule and prepare for a real, scientific and indepth exploration of our solar cousin.
As real as it gets. Stunning sim. 11/10.