My router is at the main floor and one of my PC is located on the 2nd floor, and it also pretty far away from my router. I use the antenna extender and still pick up the signal pretty strong. I used it for almost a year now and have not see any signal drop once so far.
Very good looking high end card; I brought 3 of these cards for my home use, it runs very stable and fast
Getting more expensive than the other similar product