Even the most expensive special effects cannot match 1% of what viewers can create simply with their imagination. Very few directors have the skill to use this ability of the audience. Unseen is always a lot more scary and disturbing than seen.
There is a 5 minute scene in first half of Ugly. It has no dialogues. There is hardly any action. But it will chill your bones and you will remember it for a long time. It is worth watching Ugly, just to experience the skill of the director in this one scene.
Anurag is truly the gangsta of Hindi cinema. He drags his audience to ultra real, scary and uncomfortable places to meet and confront demons who look just like people you see every day.
Ugly's world is a dog-eat-dog world. Everyone is in it for themselves. They will sell their best friend and his kids to the highest bidder in the blink of an eye.
If you enjoyed Black Friday, Dev D, Gulaal and Gangs of W, you will enjoy Ugly. If you did not, then it is best to stick to Mega Entertainer Sal Khan's movies.