This is what MSI has been getting good at, refining the process of doing something with a cheap price tag. It may not look original or unique but take a good look at the mouse and see if you notice.
There are not many gaps. Remember all your mice with sweet gunk inside those cracks. This mouse puts the connection seams on places you rarely touch.
If you look at the side buttons and scroll wheel, they use texture to differentiate them and make them easier to scroll. The scroll wheel is also flat reducing future wear.