Where as the M5 GPS seems to only use satellites with an SNR of 30 or better. The high quality accessories include a USB / power base, car adapter with speaker, suction cup mount, power dongle and software. Since the M5 is primarily used for ground navigation, Garmin includes a version of MapSource in the box. Some sellers are also including the updated 2008 version of City Navigator. If you plan on using the M5 for road navigation, consider purchasing an SD memory card with at least 1GB of storage.
It is possible to get an Internet connection when the M5 is paired with a compatible Bluetooth cell phone. One problem we had is that we are not able to make the connection using the connection dialog found at the top of the screen. To make a connection we have to run the BTExplorer application, select the cell phone in the Favorites list and then Connect from the menu.
Overall the M5 is an excellent value. Prices for used units are around $150.