So it's true, No Man's Sky is a shitty PC port. Playable, but only just. The frame rate isn't great, the game seems to pause and stutter on object load, the pop-in is bad, and the interface is not intuitive. There seems to be really bad mouse smoothing, mouse sensitivity options don't work as advertised and the FOV, while thankfully adjustable, doesn't seem to be as high as indicated. 100 indicated feels like 90 at most. But I can live with 90.
The game is more or less right up my alley, endless wandering around in procedurally generated environments occasionally saying, "wow, cool!" The combat, such as it is, is laughable and the amount of actual stuff in the game so far is quite low. But it feels like the foundation is there for a really great game. Think Terraria 1.0, which means that I can't wait for 1.1 and up. But, there's a lot of technical issues on PC to be fixed first.
You can tell the team is new to the whole PC thing, when they were showing off their own game they were playing it internally with a controller. So the clueless PC interface is understandable, as are the technical problems. They seem to be listening though, and hopefully they'll learn. So far they did something HIGHLY ambitious for a small team and mostly pulled it off - however they oversold it as the game to beat all games, makes sliced bread look last century, etc. It's certainly not all that. In terms of combat mechanics, story, npc interaction, etc it's all very simplistic at best. It's more of a slow, meditative discovery simulator with a bit of Minecraft. If you run through it looking for cool fights or scripted events to do, you'll be bored. But if, like me, you loved wandering around aimlessly in an Elder Scrolls game going "wow" at the pretty pictures, this game gives you an endless stream of that, and occasionally some bits of crafting and resource gathering to do, with combat mostly as a nuisance.
I'd say wait on this one unless the description sounds exactly like your jam. Then try it out but be prepared for some PC port issues on the side.
On the PS4 it's more stable and more optimized, however you will be dealing with 70 fov (supposedly, feels like less), 30 fps and aiming with a controller. None of that is acceptable for me but if you don't mind it, it seems to be the better running version at the moment.