Santhanam is at his usual best. He is spot on with his expressions, timing & delivery. Combination scenes between Santha, MS Bhaskar (Santhanam's father) & Thangadurai are entertaining.
Santhosh Narayanan, for a change, takes the backseat, as his music does not stand as one of the highlights of the movie.
A1 is an inconsistent but enjoyable joyride.