It tries to be Planescape: Torment 2, but it fails. Companions aren't great in general. There are some good moments of writing here and there in the story, but it doesn't hit top tier at many moments.
Gameplay is subpar. The combat is mostly weak. Encounters aren't fun. There are two or three encounters in the game that can be solved creatively, but other than that, it was very underwhelming. There are no fun abilities and items feel like an afterthought. (Hell, most things involving combat feel like they were an afterthought.) Visually, it looks good in places, but in others, it looks really bad. There's no real lighting system and shadows are non-existent.
Of all the areas of the game, I enjoyed The Bloom. It's well done and was the vision of George Ziets. He's a talented developer. The game was in pre-production for several years and was reworked many times. During that time, project leads and leading developers on the team left. I think it changed leads on some roles two or three times.
It might be worth one play through if you're curious, but a masterpiece, it is not.
