If you liked planescape: Torment, baldur's gate 2 and final fantasy tactics, then you will love this game. Be warned that this game is very challenging.
It's not for everyone, but if you do your homework in understanding the pathfinder rules and party builds that work in this cprg adaptation you will be better placed to actually enjoy the excellent story, finer details and immersive world that owlcat has created.
You can tell that owlcat put passion into this game, and they did an incredible job for their first game. Other reviewers have pointed out that it still has some bugs and performance issues. But if you like tactical rpgs with good stories, you should definitely try this game. Just remember to search for party builds before starting!
It's very much an unpolished gem that is nearly a masterpiece.