I use a data card in my laptop for mobile Internet access in my company work van, and before I used this antenna I used to be knocked offline constantly, even in metropolitan areas. It was hard to get any work done.Before I had this antenna I had to repeatedly reboot both my data card and it's software, which was a real pain when I was trying to access our company network and complete work in a timely manner. Now I am hardly ever knocked offline, even in exurban and rural areas! What a difference. With the purchase of an adapter for my cellphone, I can even use the antenna to boost my cellphone signal in remote areas, as long as the antenna is attached to my vehicle; the sheet steel that the magnet attaches to provides a ground plane necessary for the antenna to work.The difference is astounding! A must-have accessory for mobile Internet users, or for those who can't get good cellphone reception where they travel.