The Glorious Model D has two side buttons, which is enough for most people who mainly play FPS games, but won’t be great for MMOs. Although you can create multiple profiles using the software, you’ll have to cycle between them inside it, as you can’t program a button to change profiles. The side buttons also have a decent amount of pre-travel, but all buttons are clicky and the side buttons are slightly bigger than the Model O buttons, which better suit an ergo-shaped mouse.