Although the app is free, you'll be offered anti-viral and anti-spyware utilities, a browser toolbar, and other features during the Hotspot Shield install.
If you aren't already protected this might be useful, but for most it's an annoyance.
Even worse, the Hotspot Shield injects an AD bar on the top of most web pages you view while connected to the service.
Nevertheless, Hotspot Shield is free and will keep your Internet activities private. Currently it's offering usage up to 5 GB per month, which is more than enough for casual usage while on unsecured networks.
Hotspot Shield also supports up to Windows 7 and Mac OS X Snow Leopard.
Once installed in Windows, you'll find an icon in the system tray. You can glance at its color or hover over it to get the connection status: connecting, connected, or disconnected from the VPN service.
To bring up the connection properties window, click the icon and select Properties. A simple web page interface appears, in which you can see the status and get the connection details: VPN IP address, VPN server address, bytes sent and received, and date/time you connected.
To disconnect from the service, simply click the icon and select Disconnect.