the manga is so-so
personally, I like stories where the lead is female. Especially if she's strong-willed, capable and such.
but this one, like dustfox said,
it wants to be initial D too much and failed big time.
things like... never driven before and drift after 1-2h of instruction?... driving without using the clutch? I don't know what to say. If someone is pro at driving please enlighten us, but to my limited knowledge, doing that - if possible would not only kill the engine and but the clutch will be gone fairly quickly as well.
the story, or the lack thereof, is mediocre at best - typical genius type who learn really quickly, then meet some old guy who at first seems insignificant then turn out to be some super elite dude.
take any shonen manga like naruto, bleach etc then sub in the chars and u'll get over rev
the races are extremely boring - the end