The Wasp Woman is a b-movie from Roger Corman - if you know the name, you should know what to expect. Is it basically a rip off of The Fly, released the year prior? Totally.
Our lead character, Janice, is getting older, which is bad since she is the face of her cosmetics company. Wait, wasn't that the plot of Catwoman (2004)? Anyway, 1950s science fiction to the rescue. Naturally, of course, there are negative effects. She turns into a monster. The end.
With a runtime of only an hour, it still feels long. The acting, and dialog are what you'd expect from the era. For what it is, The Wasp Woman is not too bad. If you like the charm of sci-fi/horror produced in that decade, it's worth a watch.

What did I not like about the movie? Since most of it takes place within a science lab, there are animals being kept in cages/tanks. In an early scene, two guinea pigs are stuck with a syringe; now, given the camera angle, and the lack of response, it's hard to know if our little friends were actually hurt or if it was just convincing. What was harder to disregard was the scene with the cat: either a cat was actually hurt or the special-effects team made the best fake cat ever produced.
Just a reminder: Labs still test on animals to this day. Animals are not ours to experiment on or abuse in any other way. Animals are here with us, not for us.