Did you get one or four units? This is a directional antenna. You thus need to position it in the right direction if you are trying to maximise range. Also on the client side, your client must also be pointing in the right direction. If you get it right, directional antenna can improve range. In the early days of WiFi (when it was still 802.11b), people built their own directional antenna. The following was one made from a Pringles can.
Got one unit.
A. Yes, I know it is a directional antenna, that is why I bought it.
B. Yes, I also know about the cantennas from a decade ago. Pringles can, coffee can, etc.