Gorgeous visuals, gloriously difficult but with a surprisingly gentle learning curve. There is a ton of things to do from the get-go and maintaining a good focus is hard (in the best way!). Starting your colony over with the same mapseed is a wonderful way to see yourself improve.

When I bought the game I was worried that I went in the deep end, since I didn't have much experience with similar games. But there is a little bit of nice guidance without telling you exactly how things work early on. There is no need for wikis or videos telling you how to proceed, because exploring and reading in-game gives you nice views how to expand at a good pace.
Actually, I would suggest against searching online for solutions as a huge part of the game goes away if you don't try to figure out the problems yourself.

I only have one possibly negative remark. A lot of work goes undone by the dupes because of small requirements that aren't met. Once you are familiar with the game these "issues" are nonissues, however the first hours I played I was very confused and can imagine it happens to more new players. Let me explain:

For example, I couldn't understand why my dupes never put away the food they made in a storage box, and that was until I realized that everytime you find a new type of food item you have to manually add that to the acceptable items list. So new types will always be "unchecked" even if you have previously checked the box to accept all types of food.
Similarly I had to uncheck the boxes for storing polluted dirt after the dupes stored all the polluted dirt with my minerals since that was closer than the Compost I had built.

These remarks are of course nothing for experienced players, and I know these things now. But perhaps it can help someone in the future.

So a short summary:

Positive:
✔ Visuals
✔ Sound
✔ Learning curve
✔ Amount of content
✔ Easy to start over
✔ The overlays
✔ All the amazing extra content they add after launch

Negative:
✖ No emphasis on research early
✖ Storage units and their 'always manual'-checkboxes

This game just keep getting better and better, and is insanely addictive.