I would think for filter applications that isolation is as important as
the Q-factor. Isolation is an area where MEMS resonator still lacks far
behind SAW and bulk wave resonators.
-Michael Pedersen

Jacques Jonsmann wrote:
> The Q factor determines how accurately you can measure the resonance
frequency. High Q factor means high accuracy. This is very important for
resonant sensors.
>
> For filter applications The Q factor determines the bandwidth.
>
> Jacques Jonsmann
>