I didn't really know what to expect from the Sizor Dog Nail Grinder, but I must say that it's more quiet and grinds the nails better than I thought it would. I don't know if the grinding bit will eventually wear down, but right now, it works great.
The form factor for holding it is very nice. The plastic grinding bit cover allow you to get used to using the tool in a good way, only exposing the grinding part that you are going to use, for small dogs, it has a small exposure of the grinding surface. For the medium to large dogs it has a larger opening to access the grinding edge.
Once of THE BEST things for me is the small amount of noise that the grinder generates. It's extremely quiet...quieter than an electric razor or set of clippers! WAY more quiet than those.
Of course, as with anything, getting the dogs used to this is the big challenge, but so far so good. Lots of treats to start, next thing you know, if you are consistent with the treats, anytime you pick up the nail grinder, the dogs will come to you no problem!