I have to admit i was a bit frustrated by the Cooler movies, probably because Freeza is my favourite bad guy :)
In the first one he goes a 'stage that Freeza couldn't achieve', yet Goku just goes normal SSJ and a punch from Cooler is like nothing :(
Plus Cooler goes from invincible to dead in about 2 minutes, which most of the movies are like. Think about it, it took like 8 episodes for planet Namek to blow up in '5mins' :o