I was so excited to learn of a product that would allow me to cut my dog's black nails and not cut into the quick.  Well my excitment turned into dissapointment after the first few bloody cuts.  The lights are inconsistant even on nails that you can see the quick. 

 I did not have a problem with the sharpness of the blades, they cut into the quick just fine.  While cutting through a thick nail there is a loud pop noise as the blade finishes the cut and it scares my already tramatized dog. 

 I hope the store has a good return policy.