What I think is worth mentioning: In the antenna the power supply is installed. Simply plug poke, turn and look. Many other active antennas you have still a lot of money for a power supply to buy, as there is hardly a device outputting the necessary current through the antenna cable.
I already had the "successor" of this antenna, the Super Digitenne. While this looks better and is significantly smaller, the reception is not nearly as good as with the TT1.
The antenna has been tested by the way of the Stiftung Warentest with "good".
Conclusion: I would give me the antenna at any time to buy back, as it is cheap and a great coverage.