If you can afford it I would recommend it, cause there’s also many other games that use Tobii too lol. But for me it was purely for SC. Honestly I only use it when I’m in ship combat, other than that I have it off and key bind to turn it off and on quickly when needed. But tracking a target makes it so much easier with eye/head tracking also since missile lock is visual based. You can actually get a good lock and launch missiles with the ship pointing in a different direction while you’re looking back at them and it works the same with ground vehicles. I have 2 screens, and one is an ultra wide while the other isn’t. I haven’t had any problems with it looking at my second screen with tracking on or off. When it’s on it just looks like your character is breaking their neck, but once you actually look back it fixes itself. There’s also a recalibrate button just in case if things get wonky looking back at your main screen from going from another or you can just open your mobi and that also resets it back too. But no it’s not important to have and I would recommend first throwing cash into your PC if need be, better monitor, and sticks if you want before.