How bad is it? Cheesy effects, but great plot.
Should you see it? Yes. It's one of the most beloved bad films.
There are a number of films about giants that I may review (Amazing Colossal Man, War of the Colossal Beast, Village of the Giants), but this is the most entertaining of them. Skip the remake starring Darryl Hannah - as well as similar titled films (e.g. Attack of the 60 Ft. Centerfold).
Beautiful alcoholic Nancy (Allison Hayes) sees an UFO crash and discovers a 30 foot tall bald alien inside. The police don't believe her and the TV news makes fun of her and soon everyone's making fun of the town drunk. Meanwhile, Nancy's husband cheats on her with floozy Honey (Playboy playmate Yvette Vickers). Nancy's discovered on top of her pool house (!) and is feeling strange. Soon, she's growing out of her house, as her doctor tries to care for her (there's a hilarious oversized syringe and papier mache hand). Nancy just wants her husband and soon terrorizes the town dressed in a bed sheet bikini, destroying trees and houses as she calls for him: "HAR-R-R-Y!!!"
The special effects are bad. You can see through the giants, whose size varies. The props are rarely to scale. The dialog is stilted, the acting variable. What makes it interesting is pondering what's going to happen to Harry once Nancy finds him.