Conclusion: The Navigon-powered Delphi NAV300's feature set is almost identical to the Navigon 5100's. If you don't need the live traffic option but appreciate a Bluetooth phone interface, the NAV300 is a better choice. But if you need live traffic info and don't care so much about Bluetooth, the Navigon 5100 is $100 cheaper than the traffic-enabled NAV300.
Pros: Offers text to speech. Optional subscription-free traffic function. Multisegment routing. Zagat Survey listings.
Cons: Can't search POIs near destination or near specific address. Bluetooth phone interface doesn't sync your phone's contact list or call history. Separate traffic receiver and antenna.
Conclusion: We’re willing to cut the Nav300 a bit of slack due to its low price of just $399 USD, but it’s still a flawed product. It’s very ponderous and slow, and due to this you would not be able to quickly dial in an address while driving. You would have to either pull over and do it, or go through the motions before driving, which can take several minutes.
Pros: Accurate navigation; lots of features; can find points of interest
Cons: Slow; extra features are useless; screen is too small; orphaned stylus