Summary: First of all this antenna is really big. If you remember the souvenir baseball bats they used to give out at ballgames, this is slightly larger than that. I purchased the the Hawking HAO9SIP ($85) along with the TP-Link TL-ANT2408C ($15) and a Hawking HA12W ($36) at a local electronics store. I purchased all 3 to see if there really was a difference in their ability vs their cost.
Summary: This was bought to boost the signal on a construction site, coming out of a SonicWall TZ100. Prior to installing it, the 802.11n Wifi signal reached outside of the wood-framed trailer approximately 75' before dropping below 30%, rendering it essentially useless at that point. Once this antenna was mounted approximately 3' above the flat roof (to the base of the antenna) the signal reached to the edged of the site (270' away) with 52% strength.
Summary: I have bought 3 of these for different applications and all work very well. I suspect some of the bad reviews are because someone is trying to use it with a router which is not compatable. I had that problem once myself with a particular router.
Summary: Hawking is almost as bad a company as Best Buy. That is really saying something. This was the second of 3 items that Hawking told me I would need, after the fact. I have bought all 3 because I have a tiger by the tail and can't let go. I am still not up and running. THIS ANTENNA IS TOTALLY WORTHLESS AND DOES ABSOLUTELY NO GOOD!!
Summary: I'm in Afghanistan and about 25 of use a dish internet system. The internet cold never connect or just super slow. I bought the Antenna and put it up outside my tent and Soldiers three tents away are surfing the net.