If the N22B was flown in normal civilian operations within its envelope it was okay. If you moved into the military style envelope of combat power down in the weeds, ducking around trees and up creek beds it was scary. Likewise don't try and hang around Vne because the tailplane developed a vibration like driving a vehicle with poor suspension on a dirt road with a corduroy surface.
The one that crashed at ARDU was operating from memory at Vne +
It reminded me of operating the B35 V tail. Operate it conservatively and you will be okay - get daring and your may well crash as many B35 drivers did when the tail separated at the upper end of the speed and G force envelope.
It was a very agrarian/industrial piece of kit, underpowered but great little Allison engines that sipped juice. In PNG Ops in the highlands it demanded careful prior prep and planning and a ready supply of undies for both the pilot and the pax. A Twin Otter was just so much more reassuring.