This game at first, reminded me, Dead Space, since Dead Space had a more original sense at that time, this game, even though, does not feel that original, it is a great one.
It is an AAA game in term of development, environment, music, narrative, characters, etc.
The story is very good, it makes you keep going to understand what it is happening the situation. In general term, it is very well developed. However, could be better.
Graphics are top notch, the are some effects that are not usually seen in other games.
The length is proper for the difficulty, around 12-15 hours. Even in the easiest difficulty, it is challenging at some point, specially the final bosses (both, the regular game and the DLC).
After hours of mastering the gameplay, it becomes slightly less challenging. In this sense, it makes sense to me to go on with the DLC since we have to take advantage of those hours mastering technique... for me the ending of the DLC is slightly disappointing the main story is not.
Recommended game for a long weekend.