Very sharp.
The nail clipper is very sharp and cuts well.  It is also very compact, which makes it easy to carry in a bag or on a keychain. The negative part of it is the placement of the file. It is locked in place, because of the overall design, which makes it a little awkward to clip the nail. It can be done, but the file gets in the way a bit. You have to hold your fingers a bit to the side, since the file is perpendicular to the clipper.  Otherwise, it does main job of clipping the nails with ease. My nails are a normal thickness, so I can't say for sure how it would work on someone whose nails are thicker, due to a fungal infection. A couple of people have complained about it in those circumstances, but I find it extremely sharp, so it should be able to handle even thickened nails but I'm only making an educated guess.
Rating: 4 stars