I did a search on this topic, but most posts are several months old. DH and I will be taking a 2+ month cross country trip. I want to buy him one for Christmas. We need a system that is user friendly, and that will have a signal in all parts of the country. From reading others opinions, it seems that a voice telling you where to turn is a desirable feature. Are there any that I can ask, "where's the nearest Walmart", etc? What else would be useful? And what features are useless to average user. Any suggestions?
