If you take your machine to classes and quilt group get-togethers, you’ll appreciate the gap at the top for the handle (or, leave that off if you don’t need it). Machine cords and other tools fit in the end pockets for traveling.
The cover, from The Patchsmith (Amanda), was inspired by a similar cover by Ros from Sew Delicious. Amanda added a gap for the handle and the pockets on each end.
A second tutorial, from Notes from the Patch, provides instructions for measuring your machine and making a nicely fitting cover. You’ll also find instructions there for creating the end pockets.