No Good!
This stuff DOES NOT WORK!
It worked okay for the first few years I used it but last year didn't work so well and this year didn't work at ALL. I had to switch to Advantage, which is far superior and if I remember correctly was a few dollars less.
If I could have rated it no stars I would have.

Frontline plus Cat
I am so glad that this product does work my 2 wonderful spoiled cats :-)

Is this a counterfeit product?
Frontline has worked great for us in the past, but this product does not seem to be working after 2 months. We have a terrible flea infestation. I called Frontline and they will not guarantee their product if purchased from Amazon. Is this the real thing or counterfeit? I am very disappointed.

great product
I use this over the others because it also handles ticks. We used to have fleas bouncing around our floor during the summer if I didn't vacuum and comb the cats twice a day. Before Frontline, we made a game out of squishing fleas. It kept us sane.

Good product
Used this on two feral (stray) cats who have adopted us. They came to us with fleas and one seems to be allergic, as well. Within 24 hrs of using this product, they got relief. The only problem is that it only lasted about 3 weeks. In fairness, our yard is full of squirrels and they are notorious for having flea infestations, so I'm sure that's why it didn't work any longer. I've used this on my indoor cats with much more product longevity. I would buy this again.