I have been a nail biter for several years with no avail. I thought that I would give this a try since I vaguely remember it working into my childhood, and work it did.
The scent wasn't bad when applied but the polish was awful. I made sure to apply it to my cuticles, and the skin around my fingers, since I had so often bit that as well.
The taste was enough to keep my fingers out of my mouth, but I had to kep reapplying often because the taste would fade quickly. I found that it would last a couple of days, before I would have to reapply.
The packaging, and bottle are very unattractive, not a product that I would want to keep using, and the brush was difficult to hold, it should have been designed similar to that of a regular nail polish bottle, and this would make it easier to use.