Well, I'm done with single player. It's only 10 hrs long, which is, considering 30Gb weight, quite a little. Also, half of this 10 hrs is made of cutscenes. Though, it is quite intensive in terms of events per minute, so it doesn't feel like a short game.
Style-wise it is like Max Payne 2 meets GTA IV. Also, you might find some familiar elements from RDR and Manhunt. But mostly GTA for sure.
Dan Houser brought nightclubs, parties, coke, lots of shaking asses and 'lulzy' characters. I don't mind those in GTA, but it feels jarring in Max Payne game and sometimes it's clearly over-the-top. Even though it is tied to the storyline to show the things Max hates.
There are some QTEs which are pretty badly done to my opinion. You have to guess that you must press the button when you hear the sound. Also, some 'railway' shooting like those you see in GTA or RDR, when driving or flying, or riding a boat, which are not bad by temselves, but there many of them and sometimes controls are quite clunky for them.
What is really bad (but I hope they'll fix it with patches) is that your weapon most often resets to primary after the cutscenes. And that is sometimes really frustrating as often you're thrown into an intensive gunfight after the cutscene.
Other than that the game is mostly great. Despite the change of the game location to Sao Paulo, it is dark and noirish. Environment artists did a great job.
The plot is okay, though most of it's twists don't come as a surprise at all.
The soundtrack is fantastic.
Overall, the game is a mixed bag. It feels like a nice reboot to the series. And if you're inclined to see it that way, you might like it. It also seems Rockstar tried to stay faithful to the source while bringing 'what they do best'. And though the game has some frustrating moments gameplay- and style-wise, mostly it is fun and engaging.