I’d say depends on your car and how you drive it.
If your car is brand new, and your not the type to be launching it everywhere. An insert is enough.
If your car isn’t brand new and suffers from wheel hop, I’d be cautious of fixing an insert to a sloppy mount.
Also if you like to launch it, then an insert will still not be the best idea.
Just make sure you research the mounts. Some are harsher than others. I know
@paddy6789 had all 3 Racingline fitted and it was like a race car with the vibration and noise. However that might of been the gearbox mkint that caused that.
But
@theoldboy has the full Revo setup and is happy with it