Chances are, when it comes to the actual USB device, you will find that AT&T products are fairly reliable.  In many cases, you will also find that the product exceeds its warranty period.  That said, when you purchase AT&T Broadband Cards, you may also have to use them for ISP hosting services.  As may be expected, if you are looking to take advantage of wireless technologies, you may find that WIFI hotspots are hard to find.  Unfortunately, if you are traveling, it might be just as easy to use to use your laptop’s internal router and antenna to connect to a public WIFI hub.  On the other hand, chances are you will not be very comfortable sitting in a rest stop on the thruway, when you could be using your laptop in a quieter area.