Coverage - Nearly every populated area of the UK can receive mobile broadband, although the connection quality is normally better in towns and cities
Compatibility - Many laptops and computers have built in Wi-Fi and 3G capabilities, or you can use a USB device
International use - Internet usage charges will apply when using this service abroad. Check with your service provider for the exact costs; it can be quite expensive
On the move - 3G can often be used on trains, although you may suffer from intermittent signal. Many cross-country trains have built in Wi-Fi which may be preferable
Online gaming - Mobile Broadband on a computer may be a little slow to support something like World of Warcraft. More simple, or turn based, games may work better. Some service providers offer gaming broadband packages which may meet your needs
Internet wherever you are. The sky literally is the limit.