About the size of a deck of cards, the MWR211 isn't as sleek as the credit-card-size MiFi, and because it may require some configuration, it lacks the MiFi's unparalleled ease of use. But because it lets you use whatever USB modem happens to be handy as your broadband source, the MWR211 far outstrips the MiFi in versatility. If one mobile broadband network isn't available (for example, because you're overseas or out of a coverage area), or if are outrageously high, you can swap in a USB modem from a network that has better coverage or a cheaper plan.

As an added bonus, the MWR211 also has an ethernet port to support a wired broadband source--a cable or DSL hookup in a hotel or office, for example. And if you do set it to use wired broadband as your primary Internet source, you can opt to keep a wireless USB modem connected as a backup. This so-called fail-over feature worked very well in my tests: When I disconnected the ethernet cable, the modem seamlessly reverted to the wireless modem with no intervention whatsoever on my part--I simply continued browsing and reading e-mail without interruption. You do, however, have to enable the feature during setup (Zyxel provides detailed instructions online).

The MWR211 supports 802.11n Wi-Fi, but only on the 2.4-GHz band, meaning it's backwards compatible with 802.11b/g devices but not 802.11a gear. The MWR211 also supports Wi-Fi Protected Setup, a push-button way of setting up Wi-Fi security with devices that are not themselves secure.

I tried a MWR211 with two different USB modems: a Virgin Mobile stick that Zyxel provided for testing purposes, and a friend's Verizon Wireless modem. Following instructions in Zyxel's excellent, easy-to-follow printed setup guide (also available on an included CD), I charged the unit for a couple of hours before hooking it up, then turned on the power, plugged in the USB stick, slid the Wi-Fi switch to on, and was immediately able to connect to the device via its default SSID (Zyxel). After that, I typed in the device's IP address to access its browser-based settings.

Although Zyxel provides a settings page for providing any info you may need from the carrier, in my tests both modems connected to the Internet without any intervention on my part. I did use the settings to change the SSID and also to set up security for the Wi-Fi connection (I have devices that don't support Wi-Fi Protected Setup) as well as a new password to protect administrative access to the settings. There are numerous other traditional router settings to tinker with, plus a few specifically designed for broadband users: You can, for example, let the router know what a carrier's monthly bandwidth cap is, so you can check on how your consumption is running.