In our local AMC theater there are 10 or 12 rows of slightly inclined seats at the very front, and then the main block of tiered seats. For best effects, we were advised to sit in the middle, on the front row of the tiered seats.
The storyline is thin, and predictable. Smoking cigarettes is a bad example to children. The romance connection was inevitable. The acting and the characters are not particularly memorable, but overall the movie is STUNNING, breathtaking, and awesome for its effects. The 3D is amazing, you feel you can almost touch the plants.
It is technology such as this that will "clawback" audiences from home theater DVD back to the theater.
This movie is definitely a MUST SEE, but make sure it is IMAX and 3D.