I saw a sales droid demoing a Mac at Comp USA years ago. That model had the manual eject/inject button underneath the CD tray because in normal use you never needed to push the button. To eject you drag it to the trash on screen. To inject, you just push on the tray a bit and it detects that and pulls it in. The sales droid was talking about how stupid it was to have the button there because it was blocked by the tray, never realizing that he just needed to push on the tray a bit. Ugh.