I think this is probably my favorite of the "Dragonball Z" movies before the new longer ones came out. It's mostly because I really do enjoy the notion of Freiza's brother appearing. I admit that it doesn't make much sense, because it would cause you to ask why Cooler doesn't want to avenge his father, King Kold. He obviously has more respect towards him than his brother. You could argue that he didn't find out about Freiza being killed by Future Trunks later, but he should have at least known that. This is good probably because of the film's beginning.
I just find it interesting where they set up the mythology of the series. Cooler is great as a villain and I really do like his final form. His voice is very nice and deep and he truly comes off as intimidating here. It's great to see Piccolo do a lot of damage to Cooler's henchman. By giving Cooler minions, it sets him up as a bigger villain. I can see why this guy had another movie based on him. The action is nice and epic and has most of what made the classic show so great. ***