I had an electric nail trimmer once and it never seemed to do the trick...fighting with a cord and an animal at the same time but this really does grind the nails down and it's quiet. My Jack Russells are leary of anything that's new but a couple treats later they sat there and let me trim them. I do a little at a time because this breed of dog has the attention of a gnat so a little here and there really works!This is a device that every dog owner should have in their home instead of making an appointment to goto the groomer! I have a labrador and do weekly visits to the local hospital with her and she needs to be in spiffy shape! So, this is one of the tools I use to get this done!They sent a replacement and it works perfectly. Remember when you want to use the light that you need to press the power button twice quickly to power on the light. The grinder has two sides, one for small nails the other for larger. Overall a great product.Very easy to use and gets the job done the sound is great because my dogs usually will runaway from anyhting with an odd soundOriginally purchased because my cat's nails were getting too long and he didn't mind me filing his nails manually. He didn't mind the sound (though it was loud) but he couldn't handle it touching his nails. I tried it on myself and the vibrations felt pretty strong even for me, and this was on the low setting. Would definitely scare smaller pets.My dog will sit still and let me grind his toenails because it's quiet and works great!Easy to introduce to puppiesI always used old-fashioned nail clippers to cut the dog's nails, and she was always afraid of getting his nails cut. But with this electronic nail grinder that I bought last week , I easily got my dog's nails and she was not afraid at all. It is very easy to work with this device. It has no more sound and my dog ​​was not afraid of it at all.