"Niel described it perfectly." Sorry typo.

Niel describe it perfectly. In other words, he "hit the nail on the head".

There's an American band named "Cake" (You probably know of them. I think they're from Philly...Philadelphia.). Listen to their song, "Short skirt, Long jacket" to hear the idiom used in context. I think that's the song's title. I think it's used in the lyrics. Neil described it perfectly. Some other idiom with similar meanings: "on the ball", "with it", "in tune" and "in tune to one's surroundings", or simply, "sharp". 

"sharp as a tack" is an idiom which means to be very intelligent; mentally acute.    Example:  "Mrs. Jones may be 90 years old, but her mind is still as sharp as a tack."