Summary: I was trying to push my wireless signal to a detached garage space where the signal was spotty at best. The standard antennas on my router (an older TP-Link supporting wireless G) were having problems cutting through the walls. I relocated the router in the house a bit, and slapped these guys on.
Pros: Easy to install - screw the old ones off; put the new ones on. Less expensive than a new router (that may or may not offer better range).
Cons: They are large/long, but it's not that big of a deal.
Summary: this antenna does what its suppose to, its a cheap way to boost your signal around the house, i would recommend it to others, only concern would be is its much longer than the factory antenna's so it might get in the way if your router is on a desk or shelf
Pros: good price, easy to install, boost signal
Cons: very long antenna compared to stock antenna's
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.
Pros: -Works at least as well as the 5 db antenna I was using before, if not better -Simple to use--just screw it onto your existing wireless card/router -Reliable
Cons: -Does not provide a huge jump in signal strength (no clear advantage over 5 db antennae) -Rather long, so sticks out -No major signal fluctuation (very stable connection).