I assume it is a desktop since most laptops come with very good wireless.
The one you linked is ok I guess the main selling point is it is very small. In this case they try to say they can run 300m which requires mimo support..which means it has multiple antenna. I doubt they can meet the spacing requirements for effective antenna placement in a tiny package. Also if you were to plug this into the back of the machine you will almost be surrounding it with metal
For desktop machine I much prefer a larger unit that you can set on top of the machine. This allows you to move it around a bit if you do not get strong signal or use a 15ft USB cable and put it across the room if things are really bad.
This is one I have used that works well and is cheap I just wish you could replace the antenna.http://www.newegg.com/Product/Product.aspx?Item=N82E16833704053
If you main concern is appearance and hiding the adapter the one you linked will likely work ok.