I always order Hartz products and these collars are just as good as any other brand. I do also give my babies the monthly meds for the fleas. But this is always a good backup.

This product is cheap for a reason. I purchased this for my mother as she required Internet security and things went down hill from the start. First, the program would not install from the disc, so she had to contact customer service and download the program from their site. Now, the program will not update and after searching (using Google) I find this is a widely known and experienced issue. Save your money for something that will not be a hassle.