WARNING: Review contains spoilers.
Although it took me a bit longer than most movies for the plot to develop, this movie was very action-packed, and had me strapped to my seat the entire time! A warning though, this movie is *Not* a good choice for "Family Movie Night". The "R" rating is not an exaggeration, there is a lot of extreme violence and raw bloodshed, as well as some harsh language at times, and disturbing occurrences.
Unlike many action movies, this one is very good at keeping you from realizing you are watching a movie-- I found myself completely enthralled the entire time. This is the kind of movie that will make you never want to go anywhere again without a 9mm and military-grade tactical flashlight! The only thing I found lacking was I would have liked to see a bit more character development. The audience has much more "invested" when they relate to the protagonist early in the movie. Unfortunately, the screen play writers spent too much time in the beginning following firemen around a fire station, instead of developing a "relationship" with our main character. Due to this, in later so-called "dramatic" scenes, things such as loss, fighting, or other displays of emotion feel "two-dimensional" and "removed" from the audience, because they are not connected with the lead characters.
Overall, "Quarantine" was a great movie, and I enjoyed all 89 minutes of it. Towards the very end when we had narrowed down to our group of "survivors", it was discovered that there was a secret tunnel out, which was built up as their last hope. Unfortunately although they did not go down without a fight, the ending was a bit disappointing and even anti-climactic. While this movie did have some flaws, it was still highly entertaining and I would definitely recommend watching it! As another review pointed out earlier, the trailer makes this look like a terrible movie, but I encourage you to give this movie a chance to prove otherwise!