It seems many people were disappointed in this movie due to the lack of plot or, at best, a very simple one, and the sub-par acting. In fact, I was so convinced after reading all the reviews that I would not like it as much as I thought I originally would. Regardless, I saw it used and decided to give it a shot and, I have to say, I am keeping this one.
Yes, the acting is not the best and the plot was the way to keep it together, so they could call it a "movie" and not a "music video," but I have absolutely no complaints or problems with that at all. If you search for any of the main "actors" their first occupation is not acting, it is dancing or choreography and, Sarah, the guardian, used to be a slam poet and Cassie (the source of conflict) is a professional singer and dancer by trade. Needless to say, they are not actors and it shows, but I wouldn't call their acting horrible, it was decent. Yet, the thing is, I don't think this movie would be half as good if they cast actors and tried to teach them how to dance, (they have reality shows for that) what really made this movie great was the dancing and you can tell that these guys are professionals in that respect, because I have never seen such phenomenal dancing in my life. Between the catchy and upbeat music and the amazing "popping," "Krumping" and raw street dancing this movie is definitely one I will watch again and again. In fact, I cannot stop watching the final dances in the street, especially Adam Sevani (Moose) with that awesome routine to Timbaland's "Bounce."
Anyway, despite what people are saying, if you like watching people dance to upbeat, high-energy music then definitely do yourself a favor and check this movie out.
Lastly, to comment briefly on the Blu Ray version. The picture quality is amazing, so much so, you can read what is on the shirts of those in the crowd and the sound is phenomenal. I can't tell you the exact specs, but what I can tell you is the picture is clear and vibrant and when they kick up the water during the dance scene in the rain, you truly feel as though you are going to get hit by the splash :) And, the sound is very clear, I have a 7.1 system set up but this DVD only does 5.1, but it makes up for it by giving me TrueHD.
All in all, if you are not concerned about a weak plot and poor acting, but really like watching phenomenal dancing, this is the movie for you. It definitely is for me.