So I currently have this adapter:

It works quite well I must say. But I lost the omni directional antenna. And so A good opportunity to buy a new adapter which might be better. I read a lot about this and decided I want to go with the in a lot of topics covered Alfa AWUS036H.

I found this model:

Price: US$ 21.10 with free shipping. Is this a real alfa AWUS036H? I kind of like how it looks with the dual antenna!