By cons, what I did not like:
the wax solidifies very quickly, so you have to go several times wax in the microwave for one session.
In addition I think it is much less efficient than electric epilator. I had to make several passes to get the same results I get with the electric epilator, and regrowth is not slower.
For me: a product that allows you to pamper, easy to use, efficiency rating but I am not satisfied
I also try to heat the water bath to see (case of microwave breakdown), this is possible because the spatula also has small indicator temparture, so one can quite warm up the wax bath marie if desired.