I enjoyed the total experience very much. The story is very interesting but I would imagine difficult for some to follow or understand. Regardless I liked it a lot.
I thought the acting was very good and as others have alluded, I believe Leo is becoming one of the best actors of our time. I'm not saying this is his best work, but his work is becoming very diversified and he has done an excellent job in almost all his roles, this being no exception.
The IMAX theatre is the only venue that overshadows my home environment and was first rate in every regard. Since I have a very good home theatre experience, I don't go out often to view movies, but when I do, the IMAX experience is a nice upgrade.