The direction is average and the 128 minutes movie is long and boring. There are many twists in the film but the screenplay and the storyline doesn't match up for it.
The only saving grace to this rom-com is Rajkummar Rao. He has singlehandedly made this film 'atleast watchable' and his acting looks natural. At some points we can't distinguish weather it's a movie or real life! He's that good on camera and has done justice to whatever role is given to him. Shruti Haasan looks beautiful but that's the only thing which is good. Her acting is below par and it seems like she herself is disinterested in the film. Even in simple scenes of crying, she makes it look like she's working hard to get it right.
Behen Hogi Teri is a decent film with no much masala in terms of anything. Romance and comedy are not upto the mark. Give it a miss!