The drawback is that you can't switch speeds using dedicated keyboard keys. (digitaltrends.com)
It doesn't add a space in automatically like dedicated keyboards do either, so I often find myself editing messages to put in all the omitted spaces. (techradar.com)
343i hasn't just done a resolution pass and called it a day, the UI has been updated, the game has new effects and visuals, and it's hitting PC with dedicated keyboard and mouse controls for the first time. (windowscentral.com)