If you're a Telugu movie regular and aren't yet used to watching Surya's brother on screen for extended periods of time, you stand the risk of getting overwhelmed by Karthi's distracting resemblance to Venkatesh.
But wait - that's not the real trick the kid has up his sleeve.
Naa Peru Siva sure is a hero's flick, in a way that not many hero-oriented movies are. The film, for all its commercial "formula" elements, has a very real quality about it, a quality that Karthi is the person largely responsible for.