Instruct: Classify a given Amazon review as either positive or negative.
Query: Piece of s.......

I like electronic things that work. That is usually the measure of if it is worthwhile or not. This thing doesn't work.1) Installation. The install wizzard immediately starts off with a suggestion to update your software. But you can't update the software because the wizard doesn't find any software installed.2) The USB drivers that come with the unit don't work. The unit won't recognize it's own USB drive even though it is installed. You have to download the updated USB drivers after searching the garmin web site.3) The unlock wizard fails with the initial installation. Tells you to reinstall the .dll. After 3 attempts, found a hidden link on the Garmin web page to update MapSource software to v6.5.4) Saved maps, inserted batteries, plugged the unit in. A brief flash on the screen then nothing. Dead. Black screen.Removed batteries, reset connections, reset memory card. Nothing. Unit won't even flash.Save the money. Buy a Thomas Bros. Map book. It will be much more reliable.