Summary: We purchased this less than two years ago as an update to our much older TomTom that we liked very much. This one is miserable. It ALWAYS has trouble finding a GPS signal to get started, when recalculating a route I can't simply tell it to avoid an entire road ( my old one could) and I can't just look at a turn by turn trip overview ( my old one could) these are two of the features that I used most often with the old device.
Summary: Scanning the other reviews I've nothing profound to add. My experience has been that the unit has obvious bugs in the voice commands. The maps are accurate and the updating easy and as advertised. However not infrequently when approaching a turn the unit will announce "turn left in one quarter mile" and then a quarter of a mile later "turn right". I cannot imagine how a reasonably mature code base could include such an obvious error but it keeps happening.