Whoops! I thought that this was about Buick's.
I have to disagree on the sharpening. A sharpening machine will ensure that every tooth is ground equally, something that you will never accomplish by hand. The tooth guide also need to be done to keep 'the bite' proper.
Unequal tooth height and angles will cause bar wear and chain stretch. Chain stretch will wear out the drive sprocket and the nose wheel if you have one.
As far as burrs on the teeth of a chainsaw, this ain't no pocket knife. They're all gone in the first few seconds.