Was Naruto controlled by the Nine Tailed Fox? In the anime (Episode 133), when Naruto turns into the Nine Tailed Fox for the first time during his fight with Sasuke, Sasuke comments that the chakra has its own mind. 

Was he controlled by the beast or was it the other way round?
During his fight with Sasuke Naruto is seen to be in his Version 1 of the Nine Tails cloak. According to the Naruto Wiki, Naruto has very little control over his actions. It is not until he enters the Version 2 form of the Nine Tails cloak that he loses complete control.

This is Naruto during the fight with Sasuke at The Valley of the End in the Version 1 form:



This is the Version 2 form where he loses complete control:




  In Version 1 transformations, Naruto had only the briefest of control
  of his own actions. If he fell deeper into a rage, Naruto could slip
  into Version 2, losing himself to Kurama's negative influence and
  going berserk, requiring outside help to suppress the fox's
  chakra.