I find the satellite image is very variable (not unlike Googles not that long ago), but in some limited instances it is better than Google's offer, with noticably sharper imagery at what is obviously a higher resolution. A superficial check against another iPhone 4 running IOS5 and like mine on O2 seems to indicate Apple's maps also load very much faster .
Des
The original 32 bit junkie now snorting pure 64. Sky Broadband, Wired, Wireless, VoIP, 1 Mac, 2. Hackintoshes, 1 PC, 2 HTPCs, iPhone, iPad, OS X, Windows 7
Rehab is for quitters