Pros Is fast, expandable memory, looks beautiful, is really useful for educational purpose!
Cons S voice needs lots of improvement. No different colors.
Summary The phone is really good if you go to a university or even to a school. this phone would be great for everyone one!
Pros battery life, fast gps, amazing screen, fast and smooth
Cons none so far
Summary I got the S3 yesterday, since I owned a iPhone 4S here the comparison:
DESIGN: Galaxy S3 design is stunning, the feeling on hands is incredible. The ergonomics makes all the difference. The iPhone 4S is very squarish and definitely more solid but heavier too (way heavier);
SCREEN: Galaxy S3 screen is wonderful with vivid colours and sharp imaages, 4,8 inches vs 3.5 of the iPhone, after you make the transition you wont never come back, impossible.
OPERATING SYSTEM: S3 usability is a boom. iPhone is good but never at the level of the S3, way way slower.
BATTERY: S3 gets full day + 30% remaining battery, iPhone last till four or five PM;
GPS: Galaxy S3 gets locked in less than 10 seconds inside a building, iPhone searches and searches with no success;
CAMERA: they are very similar, S3 is faster and iPhone is may be a bit better in term of quality. No dramatic difference.
S-VOICE vs SIRI: they are both very basic and more fun than usefull.
USB-BLUETOOTH: iPhone only works with iTunes, no Bluetooth, no radio. Galaxy S3 can be usb-connected to computers and flashmemory, it has easy bluetooth connection and yes ... it has an amazing radio :)
APPS: to be sincere, all relevants apps in iPhones are present in Android. They have better design but they are at payment while in Android are always free. No mayor differences.
Galaxy S3 is an extraordinary good purchase. Recommended for all ex-iPhone users. You wont regret, there is a world outside iTunes :)
Pros Stands out in the crowd of offerings from range of products. It has all the technical and software features to differentiate it as a next generation product.
Pricing and Service would be key differentiator to rule markets.
Cons To early to comment on its negative features.
Summary High-end phone introducing innovative features, great display and processor.