The person who gave one star has no idea about pencils and sharpeners. YES, at first it may seem much inferior in appearance compared to the Staedtler equivalent, but M+R does not produce debris, but quality, and it is also a German company specialized in sharpeners.
This specific one has extra bases to accommodate ALL pencils, while the Staedtler one has ONLY ONE slot for one pencil. It may produce a slightly shorter tip, but that is also a positive thing because with Staedtler, whether you choose the sharp or the sturdy one, both come out super sharp and break immediately upon writing, even if you have a light hand! So I prefer it for these two reasons! I have had both for decades, not just one...
P.S. If it squeaks when you turn it, then open it by pulling up the black cap and put a drop of oil on the top of the axis. Put the cap back on and you are ready for hundreds, if not thousands, of sharpenings!