Very much a childrens' movie. Thankfully, not particularly candy coated. There's a fair amount of action.
It's based, loosely, on the British television show that premiered in 1963 as a childrens' show. The only characters that come close to feeling like their tv counter-parts are the Daleks, though they weren't quite right either. Just not the same if they're not screaming 'EXTERMINATE!' every five seconds (when did they start screaming 'EXTERMINATE!')?
Still, movie adaptions of tv shows usually go their own way and it's not fair to be too critical; this and its sequel DALEK INVASION EARTH 2150 A.D. aren't considered canon and shouldn't be judged by that criteria.
It's a charming, modestly produced childrens' sci-fi film. Some of the sets are quite effective, it holds your interest throughout, Peter Cushing is a plus and the Daleks are nearly spot-on. Worth a whirl.