How do feed in tariffs work, are they worth while?

Feed in tariffs are the amount of money that is paid back to the owner of the solar system and or client as arranged for any power that is not used in the property at any given time and pushed back into the grid to be used by others in the general vicinity. The rate of which tariffs are paid has changes significantly over the years.
In the beginning rates were as high at over 60 Cents to feed back into the grid and over the years reduced significantly.
The feed in tariff will never be as good as using your own power from your solar panels moving forward but can make a good financial benefit to clients. On a case by case basis this needs to be assessed to decide on the correct system for the clients.