The whole theatre burst into spontaneous cheers several times, and the whole theatre completely went silent - people literally stopped chewing their popcorn - on numerous occasions.
Like you've probably already heard, the movie REALLY is a phenomenal throwback to the original trilogy, with an extra oomph and insane amounts of creativity and new found inspiration that will take the franchise to a whole new level.
The characters are three-dimensional, it's nowhere near as strictly black and white, good vs. evil like in most of the previous movies, and Adam Driver as Kylo Ren is the best example of that. Hands down, the best villian to appear in the Star Wars franchise other than Darth Vader.
Daisy Ridley & John Boyega are thrilling to watch, the old cast members, popping in during the movie were just as fun to watch.
J.J. Abrams and the writers somehow managed to create a plot that was very confined in space and time, yet they effortlessly captured the grand universe that is Star Wars with some pretty great throwbacks to the old trilogy plot-wise. Some might argue that it's lack of creativity and unnecessary repetition, but I thought it was a wonderful homage. It flowed naturally and there really was no dull moment.
Absolutely phenomenal. :)