Generally, there is no need an accurate capacitance (Only need a capacitance range) in most circuits; However, there is one exception, oscillatory circuit always requires an quite precise value to capacitor.

PS: The larger the capacitance, the less suitability in the high frequency circuit works, just because the high frequence circuit doesn’t need capacitance in natural;

The larger the filter capacitance, the lower the microwave voltage is; However, the ripple current turns larger correspondingly, which is definitely a fatal damage to all the circuit system.