Instruct: Classify the given review into positive or negative sentiment.
Query: Bad unit

I bought it when it came out first in late summer 2005. When it works, it is fine. If freezes often and sometimes will just refuse to "see" the satellites even in wide open areas. Maps were old and often would miss many addresses that were old and in urban areas. (But I suspect that might happen with any GPS unit).Upgrade was suggested to overcome these problems. DVDs arrived in time as promised. As son as I connected the unit to start the upgrade, the unit died! Tried different power cord, CLK adapter cord, different outlet... still dead. Am jumping the hoops of technical support for the last hour but I am not sure when I will get this back in order (if ever). Will update on the Customer Service experience when it is complete but I must admit I am dreading it already - 1 hr on the phone and nowhere closer to the solution...