it's totally awesome, i have it downloaded and haven't used it for anything super-practical yet, but it's uber fun to just mess around on, check it out, it's free, and a relatively small download
i use it to find good point and reef breaks all over the world and hope that i am the first one to discover them and dream about going to surf them first, its a fun program.
I use it all the time! It really changes your low lying perspective. For those who haven't seen it before here are two images. The first is San V. down in San Diego and the second is NAS Miramar. I find the second pic scary as I'm not sure we want unfriendlies to have this kind of perspective. However I have seen several military installations where the image goes blurry and for good reason!