Details from IMDB:
I'm not the biggest Stephen King fan by any means. I've read some of his books and seen a good few movies based on his works. Of course, I saw It Chapter One two years ago (and loved it!) so I had to see part 2 as soon as I could.
I have to say the actors chosen to play the adult roles are excellent. They look a lot like their younger counterparts and they show off some great acting skills. James McAvoy, Jessica Chastain, and Bill Hader, in particular, stand out. While Hader has always been able to do comedy, it's nice to see him succeed here with a dramatic role.
I never read the book but I heard about the ending. It is great to see King able to realize his mistake and basically admit it (along with other books) have bad endings. The ending to the movie (with no spoilers) is a lot better and clearer than the ending of the book.
Bill Skarsgård is amazing as Pennywise. Very creepy and scary but in the end, ultimately rather pathetic. I know people love the Tim Curry portrayal but this one is better for me.
The film is not without flaws, however. While I knew going in it was a longer movie I did find the almost 3-hour running time dragged in parts. Since changes were made from the book, I think time could have been easily taken off here. This film also relies upon CGI a lot and I think some practical effects (or even less gore) would also have been welcome.
Some people complained about the comedy bits but I thought it was welcome to let some tension go. Pennywise is one of King's most interesting (and disturbing) characters and I always enjoy seeing him/her/it onscreen.
Bringing IT to a close certainly makes me nostalgic of all the King movies I've seen. It also makes me look forward to other King movies being redone and of course sequels like "Doctor Sleep" (The Shinning sequel) soon to come. Keep an eye out for a longer than usual King cameo that has some nice humor in it. So I give this a solid 7.5 out of 10 and a strong recommendation to any King (or horror) fan. Of course, you need to see part 1 and please don't bring children. I saw a family at my kids who must have been only 8 or 9 years old, way too young to see this! Extreme violence, gore, some nudity, coarse language, and disturbing content make this ages 19+.