That's about how I felt. I bought the original "IT" on impulse in light of the remake, and it brought back a lot of old feels and memories. The book is also really good, and I highly recommend it before they release the new one, esp since they're making two movies. Really looking forward to it, along with the Dark Tower.
I really enjoyed it myself and being semi predictable isn't always a bad thing if the story is done well. We just finished The Get Down and if you are into hip hop at all I highly suggest it. But even if you arent its a great show
Some of the best stories/movies let you see the end coming the entire time. Knowing what's going to happen and the fact that there's nothing you can do to change it can definitely add to the excitement/horror/suspense of the experience.