The story is terrible, the acting is poor, the premise is outrageous, and it's still worth watching. If you're not into slapstick or British sense of humor, of course you're not going to like it. Even though I wasn't in love with that particular genre, I still laugh at this every time.
It is called "Morons from Outer Space", I don't know why anyone would be surprised when that's what the movie ends up being about. The characters say and do stupid things, because that's who they are supposed to be. Sure, there are cheap laughs, but what is so terrible about that? I wouldn't exactly call it a family film, but for pg-13, you could do a lot worse. I don't recall very many swears apart from one "distinct" one. There is a short moment of full frontal with a dude, however.
Review by dj3980 from the Internet Movie Database.