This product was recommended as a cheaper option to what I usually use, but unfortunately I found it to be completely useless. I would not recommend it again.
Fantastic product, highly recommend as part of flea eradication treatment. Dog suffered no side-effects aside from scratching for approx 10 minutes while the fleas bit. The horrid parasites were falling off either dying or dead. Will definitely be using again when the next invasion appears (hopefully never but realistically it'll probably happen in spring).