I have had a 550 for a long time and it has never failed me. Hopefully it will continue for many years to come. There is an emerging trend among GPS manufacturers to stream pop-up ads to the cheaper GPS devices. The revenue generated by the pop-up ads would in effect subsidize the cost of the GPS unit, making them cheaper for the consumer to buy. The new Zumos are expensive especially when compared to in-car units or free services that are available on the iPhone and other smartphones. I for one would rather pay up for a GPS device that will NEVER display any pop-up ads than have to look at ads for McDonald's restaurants or Mobil stations every time I am within a few miles of one. If that ever happens with my Zumo, I'll go back to paper maps.