I don't want to start pileing on here (an American football foul when one dives into a play that is already over) but the NOTAR is actually quite a bit more complex than a tail rotor, and has at least twice the number of critical components as a TR. On the other hand, it is quite well protected, and so is almost immune to failure from contact with things outside the helo.
The fan in the cone is a TR, with a full pitch change mechanism (controlled by the pilot's pedal), basically just like a fenestron. This makes the air that blows thru the Coanda slots, and also thru the real nozzel. The fan has a short drive shaft, as well. The yaw thrust nozzel at the back has a rotation mechanism that covers or uncovers the thrust nozzel to make more anti-torque, also controlled by the pilot's pedal. In addition, there are rudders that are also controlled by the pilot's pedal. In some models, there is a yaw sas that is required, and it controls one of the rudders. The sum of nozzel, rudder, and fan parts is several times more critical parts than a typical TR, IMHO.
Those TV shows that still circulate show the NOTAR as a simple device, and those web sites show only the Coanda slots, as if that is all the Notar needs to fly you home. Not at all true. A Notar is very quiet, and also well protected, and also less hazard to Pax, but TANSTAAFL.