i hated this movie. i thought there was not one positive message in it. three little girls, who live in an orphanage with a cruel woman, are "adopted" way too easily by a villain. the girls are called from their bedroom and told they are being adopted, and they are just sent home with this strange man. he takes them to his house, where the girls are kind of freaked out at how scary it is, and all the while he wants to use them to get to another villain and then ditch them. of course the point is that they end up melting his heart and he wants to keep them, but the whole premise and the message that kids should go with strangers, even when the suspect these strangers have bad intentions, is a dangerous one to send. It's like romanticizing kidnapping.
Aside from the problematic messages, the film is flat and goes for really cheap laughs. there are some gratuitous comic scenes when the little aliens (comic relief) have to go to a toy store and cause all kinds of mayhem. ditto for the disco scenes. They don't fit with the story, but kids will laugh at the antics (and the potty humor, of which there is plenty). The movie also contains cheap laughs for adults (nothing like the clever innuendos in Shrek or Tangled, for example). This movie relies on the daily struggles of parenting to appeal to the adults, but it doesn't apply to the story. For example, the kids whine and beg until he gives in, they manipulate him in other ways, too, and say the same things your kids will say, like "will you play with us?" and "I hope his house is made of gummy bears." furthermore, the movie uses the old adult-single-man-has-no-idea-how-to-deal-with-children trope, which can be entertaining (ex, Kindergarten Cop), but here it is shallow and predictable.
all in all, a simplistic story with cheap laughs that promotes dubious understanding of how much children shoudl trust adults.