Note: Mio Moov 310 and Mio Moov 300 are identical with 1 year Traffic messaging service included in the Mio Moov 310

Pros
The Mio Moov 310 is one of the most stylish and feature packed portable GPS navigation system available at such an affordable cost. The Moov 310 features a 4.3" widescreen LCD monitor that is almost 1" bigger than most GPS navigation devices at this price.
The Moov 310 joins a handful of GPS devices that is considered the thinnest on the market, measuring at less than 3/4" thick. The stylish and compact design of the Mio Moov 310 houses a powerful Samsung 400 MHz processor with 1GB of internal memory. This attractive GPS device also features a 20-channel GPS receiver with a SiRFStar III chipset with the new Instant Fix II technology. The processor and the chipset both are new technology that were recently released. Users will be enjoy the incredibly smooth and fast navigation that the Moov 310 has to offer. In addition, this GPS unit has built-in map database, so you won't ever have to shuffle for various SD cards for your maps.

The Mio Moov 310 also features a text-to-speech technology that will give drivers turn-by-turn direction with speech guidance that tells a driver of exact street names. In addition, its internal TeleAtlas-based maps covers all 50 US states as well as Puerto Rico with 3.5 million points of interest. If you need traffic information to be displayed on to the screen, TMC (Traffic Messaging Channel) is included with a free 1 year trial subscription on the Mio Moov 310. There is also an SD/MMC card reader as well as a USB port for PC direct connection.

Cons
The downside of the Mio Moov 310 is its inability to play media files. The SD/MMC and the USB port are all for map updates and firmware/software upgrades. But at this low price, you're probably looking for a basic GPS navigation system anyway. If you're not too concern about media playback, the unit is a great stand-alone navigation device.

The battery life of the unit is also relatively short when compared to TomTom's 4+ hours of battery life. The Mio Moov 310 has about 2 hours of battery life, but that's at optimal factory conditions. Expect this number to diminish as you use it more often.

The unit features a small database of 3.5 million points of interest. This is considerably smaller for today's standards. However, 3.5 million is still quite a large number and should cover most of your favorite major-name stores, hotels, restaurants, gas stations, and emergency facilities.

Overall
Ultimately, the Mio Moov 310 is worth buying if you're looking for an essential and affordable navigation unit. Expect to find this basic GPS device anywhere from $190-$250.