Sure, maybe it is a little rough around the edges, but gosh is it fun.
I played the original Divine Divinity, and still have fond memories of it. Can Divinity 2, being such a different game (most obviously now in 3D) live up to the original? Wonderfully, it does.
There are a lot of pretty unusual or even unique things in Divinity 2: mind reading, your "battle tower" that serves as your always-available home base, people you can send off to fetch herbs/gems/minerals, a necromancer who lets you put together body parts you find or buy to make your own creature to summon, and of course being able to turn into a dragon and fly around.
It never takes itself too seriously, and has a great balance of fun and challenge. Fighting is not realistic at all, but a lot of fun as you jump around knocking enemies down. There are many small humorous touches, which I wouldn't want to spoil. It has a fair number of puzzles, but mostly doesn't let them become frustrating.
Divinity 2 also does not have the now ubiquitous quest arrow, which I really think is to its benefit. The quests are designed to not need one, and it is refreshing to never get into that "go where the arrow is pointing me" thing.
Disappointingly, when you are in dragon form you can't take out people on the ground, and have to live with magical barriers preventing you from going certain places... but I can understand how difficult it would be to not let that become totally unbalancing without such limitations.
And this works, because the game never feels like it is trying to be anything but a game, so it merrily does whatever is best to be a fun game. At the same time, there is a good sense of your actions making an impact on the events around you, and the characters you meet are generally interesting and can have some feelings towards.
The voice acting ranges to serviceable to good; I don't recall any really cringe-inducing moments. On many occasions when you click on something or make a selection to do an action, a cheerful narrator reads you the text providing the feedback. The music is great (though here I would say it does not live up to the fantastic Divine Divinity soundtrack). The graphics aren't at the level of current AAA games, but are plenty good enough to not be a distraction and invite you to explore the world.
The game is a semi-open world -- it is designed around exploring, but has significant blocked off areas that you can't get to until completing certain quests as part of the main story, and other areas that likewise close behind you during the story. The story itself is somewhat standard "save the world" fare, though it has its own strong details and style that keep it interesting.
Character leveling provides lots of options. There are 4 skill trees, each with 15 or so skills which you can freely invest in regardless of your initial character class. In practice it seems like you will want to focus on a small handful of specific skills so that you have enough skill points to bring them up so they are powerful enough in later parts of the game. This is forgiving however; if you don't build your character's skills well, you can pay some gold to re-assign them. This also seems like a good opportunity to try out the wide variety of other skills you didn't initially get to use, without having to replay the game.
It also seems that equipment is a key part of character leveling. In later parts of the game I found myself feeling underpowered, until I spent a little time picking out better equipment and applying enchantments and charms to beef it up. Your equipment can impact every part of your character: improve skills, add health and magic, increase rate of healing, etc.
There is just a huge amount of fun gaming here. And I have not yet even gotten to the expansion that is included. Anyone who enjoys RPGs should give this game a shot.
