I watched a screening of this at a convention where SF writer Joe Haldeman, who did the screenplay, sat in back with a something eating grin on his face.
What's not to like? In celebration of their son's visit, the family has meat--a lone weiner floating in a tureen of soup. The female pilot makes all the men nonplussed, then has the tables turned on her when an enemy robot unleashes a giant crotch chainsaw in the midst of a duel, for the obvious Freudian tie-ins (at which point Joe was grinning mercilessly.)
All the jokes and innuendos are way over the top. As Joe put it: "I was writing a movie for adults that kids could enjoy, and the director was writing a movie for kids that adults could enjoy."
Add in a Slim Pickens performance invoking Dr. Strangelove, and it's a twisted, unsubtle romp through political incorrectness, poking fun at (among others) environmentalists, capitalists, global politics and sports fanatics (the spectators who get squashed under a falling robot).
Oh yeah, and it has these kick butt robot warriors, too. Grab your friends, grab the kids, grab a pizza and a couple of beers for the adults and laugh until you choke.