Right. It does NOT help studying unless you're horrifically bad at learning things.
It makes sitting down on the same subject for five hours more tolerable, though. So, if you wouldn't do any revising otherwise….
Likewise, you can make unmindful mistakes while racing because you're given ideas regardless if they're necessary. You can't check out while on it.
If you're dumb, you'll probably do better on tests with it. If you're looking for no mistakes, then it's a bad choice.
It makes running waaaayyy easier, and I'd be incredibly surprised if it did not raise your maximum potential.