I found the built in battery life to be annoying. It claims to be a put in your pocket and travel unit, but don't travel farther then the length of the battery cord! Two hours depletion. No available cord to wire to your car fuse box, so be prepared to have a huge cord hanging in the most inconvenient place in you car! Unit sent me on numerous routes through the country-side, even though I chose fastest route. Wound up driving on 25-mph roads half the time, even when a 60-mph highway was parallel to the route. This in areas I know. God help you in the boonies of West Virginia! Bring a few gallons of gas in a can, you'll need it to get back to the main highway. The voice command lacks a "curve" option, so all curves result in "turn left" or "turn right" which were confusing when there was an intersection in the curve. You need a co-pilot to watch the screen in curves to keep from getting lost! It failed to quit if you reached a destination and decided to go on (to the store or something). It never shuts up-keeps saying u-turn now, u-turn now, u-turn now. Had to power down to shut the woman up! Selection options are good if you are sitting in your living room using a computer linked to Mapsco, then you can program routes - duh! In the car alone? Forgit it. Options are inconvenient at best. Plan on a lot of time on the side of the road re-orientating it to an alternate destination. Inconvenient switching from find an address to address book. Takes lots of practise; or starting over in each option. Points of interest are already out of date; this from a brand new unit. No upgrade options available. Register if you want a manual, no access otherwise! Not happy with all the little annoyances. Overall, a good unit. But little things will drive you nuts!