The TomTom XL 340 S builds on TomTom's successful XL series of wide-screen portable navigation devices. The XL 340 S' features, such as advanced lane guidance, daily fuel prices, IQ Routes, and TomTom Map Share, work together to constantly update its map data and route-mapping algorithm. Therefore, in theory, the device should get better with time.
Also, as an "S" designated model, the 340 S features text-to-speech that reads aloud street and point-of-interest names for quicker recognition.
A 4.3-inch WQVGA wide-format touch screen occupies the front of the XL 340 S, while a large, loud 2-inch speaker dominates its back. The only physical control to be found is the power button on the unit's top edge. The Mini-USB port on its bottom edge serves as the connection for the included 12-volt car charger for data connections.
Unlike its primary competitor, the Garmin Nuvi, the XL 340 S does not have an SD or microSD card slot, so you're stuck with the device's 2GB of onboard storage (most of which is occupied by map and voice data).
TomTom's clever EasyPort mount integrates the XL's cradle into the back of the unit. To attach the unit to your windshield, simply flip out the suction cup, place the device on the windshield, and twist the locking ring a quarter-turn. The twist-lock suction cup doesn't feel as secure as the Garmin's lever-actuated suction cup, and the XL's increased size made us feel even more nervous about the mounting than the TomTom One did. With a bit of practice, the TomTom's EasyPort mount becomes quite easy to place and remove from the windshield and offers a bit more flexibility of mounting angles than the Garmin.
The integrated cradle adds considerable bulk to the XL's already large size, more than doubling its thickness. People who want to pocket their GPS when they leave the car will be turned off by the additional mass, but those who carry a bag or purse probably won't notice. An additional bonus to the EasyPort mount is that there is no cradle left behind for would-be thieves to mistake for something of value, thus increasing vehicle security.
Also included with the XL 340 S are a 12-volt car charger, a USB connection cable, and an adhesive disk for attaching the XL to your vehicle's dashboard if windshield mounting is not permissible.
The TomTom XL 340 features Advanced Lane Guidance, a new feature to the XL line that shows detailed illustrations of complex freeway interchanges, complete with lane information. Arrows overlaid on the illustration notify drivers of what lanes will keep them on the chosen route.