We never use it unless we have to, since Bing and Google supply imagery at lightning speed, with street level photos in some cases. But when forced to use ArcMap with imagery behind our street shapefiles, it is extremely slow. Impossible to use slow. Perhaps I am using it incorrectly, though. Are there any tips? I have written this entire post in the time it takes to refresh after zoom from one blurry level to another. My colleagues gave up and use google earth after clipping the local streets and exporting to KML. They are happy. We will try 10.1 when we receive it, but I have little hope for improvement. Does ESRI care about ArcMap performance anymore?