Another tool in the tool bag...
As someone said earlier, you can't abandon your basic RIT tactics because this device has its short falls, portable radios can interfere with the device and depending on the building and its contents there can be a lot of interference also. We have used it extensively in our department with mixed results. Remember that the transmitter signal will reflect off:
Metal, including structural framework
Large metal objects,
Concrete walls or floors,
Brick or concrete block construction.
Also the Transmitter signal will be absorbed by:
The Human Body
I think its a great concept that needs to be improved. Using it along with TIC and good basic tactics is your best approach.