This review is based on a few hours spent with Obduction, being far from the end.
I must say I was very skeptical about Obduction, as the developer chose to disclose very little information about the game prior to release. That's usually not a good sign. But it seems they knew what they were doing. I myself tried really hard to avoid any detailed information as to avoid any possible spoilers. I'm a huge fan of the Myst series and I was eagerly waiting for this since it was announced.
So far the world seems really well put together. It's pretty, colorful and detailed. Puzzles are the standard Myst/Riven type and are well integrated into the world. Most of the time they feel on the easy side.
When I started playing I had no idea what I should do. But the game does a great job of hanging the carrot just in front of me, and as I progress through the game, so does the carrot move just a bit further. So I always have something to do, even when I'm stuck with one puzzle for a while.
Sound design is quite good, not excellent. Some sound effects seem a bit too loud, walking on some surfaces doesn't quite sound as it should... but these are very minor complaints, and are only noticeable when I focus on them.
There are a few "character interactions", similar to watching and listening to Atrus through a book page. These are in my opinion poorly written and acted, but that's nothing new in a Myst game, and there are only a few of them (so far).
Right now I'm taking a break from playing as the game gives me a very slight feeling of motion sickness, especially in tight places.
That's about it for now. I don't want to spoil too much (also, I don't know much about the game myself yet). I'll just say that Obduction didn't disappoint at all. I can't wait to get back to playing and discover more cool places.
UPDATE: After finishing the game I can say that the more I played it the more I liked it. The world is meticulously put together (almost "The Witness" level of meticulous), and it still makes sense within the game setting. Puzzles get harder towards the end. Some include a lot of running around and backtracking involved, which is a pity.
I encountered a few technical problems - game crashed a few times, there were some popping textures and lighting, even on highest settings, and some sound effect problems like environmental sounds playing even after I got further away from their source.
Obduction really is a true Myst game, with the same atmosphere, same environmental puzzles, same "no handholding" approach. I kind of liked Obduction's story more than previous Myst games. Although the ending left me a bit confused, almost disappointed. I see a lot of potential for possible sequels that could wrap things up better.
The best time I had with Obduction was while I was still discovering new amazing areas and hidden secrets. After I explored the whole game world, getting to the end of the story wasn't as exciting.