Im still rockin the stock servo too, got 6 MG90s servos on the shelf haven't needed them yet.
It's in a good position that it doesn't get damaged by mud or water and it is relatively quick. It honestly works better than my Turnigy TGY metal gear servo. Other than the fact that my TGY has metal gears and more torque. I couldn't find an MG90 single pack on Amazon so I just bought the TG9 servo for $6