After a quick search I found this wireless stick here on Amazon. At first I was a bit skeptical because sticks are in power at approx 40euro other "from renowned" producers. I figured even with an early return.
The first impression was very positive when unpacking. They had thought of everything. Manual, Quick Start Guide and Installation CD (is important to say this, there is a mini-CD, so who should be a slot-in drive assigned to the driver on the manufacturer's site get in advance).
I bought the version with "docking station". This is quite useful because you do not have to plug it back on the stick and Tower is therefore not 2xUSB courts suddenly blocked. In addition, you have a better reception if, for example also has Bluetooth Dongles off (Bluetooth and WLAN interfere quite well). What is also a good solution, the docking station has a small device for the stick-cover. I find that very well because you as a thing somewhere else lies down and then forgets where one has hingetan it.
So far I could not test the 300Mbits. But I'm very satisfied so far. I have a stable and fast connection.
There are of my full 5 stars.
If the thing to buy at any time!
(Who finds spelling mistakes may keep them;)