Comments: "Where have you been all my life?," we nearly said to this cheese slicer. (Then we thought about it and realized it sounded more than a little weird.) But after years of having cheese stick to ineffective slicers, we found one that works!
This adjustable slicer has five settings, but the one that mattered most to us is the thinnest setting. How can you make slices of cheese that are only 1 millimeter thick? With this slicer, you can, consistently, and the other increments range by millimeters up to 5 mm (about 3/16th of an inch at its thickest).
Needless to say (or nearly needless to say, for those who take everything literally), the texture of the cheese matters. A very crumbly Colby sliced well, but the back edge did crumble off as the slicer passed over it, which was not unexpected, and which we happily nibbled. A fairly soft (but not fresh) mozzarella shredded on the narrowest setting, but produced the thinnest mozzarella slices we've seen on the second setting. A firm cheese, such as a Parmesan, would require a knife. We did not test this slicer on every cheese in the world – we apologize.
Our only critique is that it has a maximum cutting width of 2-3/8" (about 66 mm, for the curious). If your cheese is any wider, you'll have to slice it at an angle or be creative in some other way.
The adjustable roller closes one notch beyond the narrowest setting to protect the slicing blade in storage (and innocent fingers), but we still see the potential for it to get a little banged up if just thrown into a drawer. Perhaps upright in a container of kitchen tools on the counter would offer the most protection.