This part, at least my copy is not worth the money.

Dual Band is correct, but in the 5 GHz manages incredible 6 Mbit / s instead of the promised 433 and the 2.4 GHz just 63 Mbit / s. A comparison Stick brings to the same position 300 in the 5 and 130 in 2.4. A request to the supplier revealed that I had apparently an unfavorable position. To make matters worse, the company is located abroad, which is not noticed when ordering. From return to want to know anything. So you better stay away or hope that a copy is what the promised data delivers. At least respond promptly to the supplier, he will first of all make a replacement. Check whether the then brings improvement.
Unfortunately, the replacement did not help either, the values ​​remained the same, we then tested it with different access points, neither did it in a Horizon, yet at a Fritzbox more power, therefore absolutely useless.