I had purchased another spot on flea product for kitties but absolutely hated the heavy oily residue. It not only made her fur stiff and greasy, but it upset her as she tried to lick it off. I didn't get that with this product. Excellent applicator that came with the vials made application foolproof. An excellent product.
Very easy to use! I have two indoor cats who have gotten fleas in the past. I haven't seen a single flea since using biospot!
I found oil spots on my couch a couple of days after application to the cats and one of them suffered irritation and scabbing behind his head. The other two did not. They also seemed a bit lethargic after use.