How bad is it? I think it's at least mediocre. Others are less generous.
Should you see it? Yes. It's one of the best cavewoman movies.
I loved this movie. Senta Berger plays a cavewoman discoverd by seven horny cavemen, who then play out the stroyline of Snow White and the Seven Dwarves... up to a point. Senta wags her tail when she gets excited. The sets look like 1960's television quality, but the film has a good look, with excellent lighting - which is a rarity on this blog - and good camerawork. Lina Wertmuller actually worked on the script and the humor, broad as it often is, works more often than not, which almost never happens with Italian films. Ennio Morricone did the music. The sequel, When Women Lost Their Tails, I thought was flat, but others think it a better film because it strives for more satiric humor.