I tried it maybe 15 years ago and didn't like it - it took longer than waxing, therefore it prolonged the pain. I would never use it on the areas that REALLY need it, such as pits and pubes -- just on my legs where the hair is finer. I have a friend who uses one on her arms, and I guess if you have hairy arms, it might be a better choice than shaving.
I stick with waxing - get it over and done with all in one shot.