Summary: This antenna works for me. I have it attached to an old wireless G card (no N or AC here). I had cannibalized a 5 db antenna from another newer card, which was good, but wanted a stronger signal since my router is at the opposite end of the house. If you're coming from one of the stubby little 3 inch antennae, this will be an improvement. If you already have a 5-6 inch antenna, this may not get you much more signal.
Pros: -Works at least as well as the 5 db antenna I was using before, if not better
Cons: -Does not provide a huge jump in signal strength (no clear advantage over 5 db antennae)
Summary: I use to have 2 or 3 lights on ,in my clear moden ,after I install this antenna the 5 lights are on and have a better speed .just remember to put the modem close to a window to have the better reception .
Pros: Extremely easy to install. Packaging was done right. No blister pack garbage that rips your hands apart. Immediate increase in signal strength from my ASUS RT-N16 router and provided just the boost that I needed for my upstairs D-Link DIR-615 running DD-WRT to act as a proper repeater
Cons: The only con is the base price. I got these on sale for $7.99 a piece. Seeing as my ASUS RT-N16 needs 3 of them, buying them at the base price of $19.99 would be quite expensive. At $7.99 they are a great deal.
Summary: Talked to customer support TWICE and both times I got no helpful information on fixing it besides extremely basic stuff like "try pointing it at the router". I read other comments on this saying to not get it, but I thought my case would be different since I am only a couple rooms away from the router. It may work better on other devices but for a desktop wireless card, it worked terrible.
Pros: None really.
Cons: The antenna is nearly a foot long and is replacing 2 2dBi antennas on my TP-Link wireless card. These gave me half the signal strength and speed as the 2dBi! I don't know if the wireless card (which is also brand new) is giving them enough power to operate or what but for an 8dBi antenna that is 3x the size, shouldn't it give you better performance?
Summary: I'm an IT consultant (25 years now). I installed this on my mom’s wireless USB NIC. Before swapping out the antenna she would only get 1 or 2 bars and connect at 5 Mbps. After putting on this antenna she would get all 5 bars and connected at 54 Mbps. The speed increase was very noticeable when just surfing the web. I'm so happy with it that I've decided to get 4 more of them, 2 for my router, one for my laptop and one for my desktop.
Summary: I bought 3 of these antennas to attach to my TP-Link router. There's a small improvement in signal strength when I test at a short distance from the router (1-3 meters). At a short distance it goes from -40+ dBm to -30+ dBm. The change is even smaller at a greater distance (10+ m). I expected a greater improvement going from 3 x 3 dbi antennas to 3 x 8 dbi. Good thing that I pricematched and didn't spend too much money.