I've had a few flight blade strikes on the ground and the tail boom.
Whatever material they're made of shatters somewhat easily, but is repairable with CA. The blade covering falls off. I replace it with covering tape used on a ZAGI.
I have a set of Plasti-blades on order.
I'm on my 4th tail rotor. The drive pins shear off easily on ground encounters.
Don't fly near grass.
My main drive gear is missing two teeth, where the drive motor ground away when the rotor was stalled against the ground.
Other than a slight ping at slow speeds, it doesn't appear to have any effect on flight.
I've bent the main shaft. It straightens relatively easily. Getting the rotor rotor head off it required fine filing of the burrs around the hole where the rotor head pin goes.
With the plane up and some distance away, I've had trouble seeing which side I'm looking at.. it gets real small real fast, so I painted one side of the canopy dayglow red to ease that problem.

The training gear is a snap-on. Other than fingering out how to do that, it's worthwhile having.