Take it this way guys,in fact let me give two examples:-
1):Maruti Suzuki DZire:This car hasn't got any special treatment,neither ride,handling,safety,comfort any thing you name and you will find that this car has all the ingredients but not in sufficient amount,still its ruling the market...ITS CALLED OVERRATED
2):Fiat Punto:Definitely good car,solid built,decent performer(I haven't said great),good FE,great ride and handling as well as safety...still Punto is not selling in even 1/4th of the numbers it deserve..ITS CALLED UNDERRATED...Am I right guys?