I did not care for the movie. Typical of most Lifetime movies it is more about entertainment/glitz than fact.
Lifetime completely ignored the most important aspect of this case: Arias' intense planning of her crime.
Instead, they showed her driving along the highway when she got angry over a TA text or phone call, she makes a U-turn and heads for Mesa right then. No planning and renting a car, no packing of supplies for the trip, no procuring gas cans, etc.
The movie was a waste of airtime, IMO. I have never been able to figure out why Lifetime chooses to fictionalize the way they do when the true story is usually far more compelling.