I am a french-fry-aholic, a french fry snob and a self-proclaimed french fry connoisseur.  My best fries are fresh-cut deep-fried in peanut oil.  I used the Ninja for the first time today to make fresh-cut french fries and fried chicken leg/thighs.  Wow, was I impressed.  The Ninja version of fried chicken and fries is almost as good and much easier.
I cannot yet comment on the Ninja's longevity but if the shrimp is also good then I will be retiring my deep fryer.  The air fryer should be healthier and the final result is too close to bother with the other.