Well I had some issues with the maps being somewhat sluggish when zooming into the DC area (where I actually am trying to decide on a hotel right now, so this is being a helpful tool), but at the same time the Panama City, FL area seems to display the maps without much of an issue. I dont know if its my computer, or Google, or if others are experiencing similar issues or what.
I would also second a PDA version. I like to have data on the go. Sure I could pull out my tablet pc, but really that can be an inconveince when your walking around an airport, etc.
Overall I think its a great tool (It too is now in my favorites), and is much more upto date than my copy of Microsoft Streets and Trips 2005! ^