Mia Farrow is fantastic in this incredibly unsettling and classic horror/thriller.

All the performances are perfect serving to further the uneasiness and tenseness felt within each scene. 

The overall sense of ambiguity developed is also amazing as I was never sure if what Rosemary believed was true, or whether she was just delusional.  

My only critique is that I felt the ending was too clear given all the ambiguity that made everything leading up to it so great.

Nonetheless it is a great film, and it’s too bad Polanski is such a terrible person because he made some great films starting with this one.