Top positive review
The cats seem to like it, don't know if it is killing fleas or not, yet.
on September 1, 2015
It makes a humming sound when you use it, but the cats don't seem to mind that and all three cats actually liked being combed by it. Don't know that it actually is killing anything, but they like the combing. Was hoping to get away from using the drops they all hate to have put on their backs, but this doesn't seem to get very deep into the fur to be effective, I have all short hair cats and it seems to skim over the fur more than go into it. Will have to test it awhile and see if it really does anything. I think it makes a buzzy sound when it comes in contact with a flea, it definitely makes some other sound every once in awhile.