I had watched this movie in the cinema when i was 13 years old, then about 6 years later and then again a while ago. Every time I enjoyed it as much for different reasons, the latest being Tim Curry's performance. He makes for one of the most entertaining larger than life characters i've ever seen.
It's NOT a serious adaptation. For that please go to the earlier movies - certainly not the one that came out this year!!! Imagine an animated movie, but with real actors. There's either a comical undertone or tightly written action scenes alternating very quickly and lasting only just enough for the viewer not to get bored. Then you have the larger than life villain, the hero and his sidekicks (since they are given an angle and stay that way that's how they are treated) and the final battle where every character is beating up villains in his own way, just like a Disney animated movie.
If it's not obvious the suggested audience would be people in touch with their childish side. Yes, i too have watched films from Zulaswki, Shinoda, Riefenstahl, et al and loved them :-) , but i can appreciate this for its own merits.