I was disappointed when I first took the phone out of the box because I didn't like the back of the phone - it looks cheap for a high-end phone (I'm referring to the camera and flash). The G S2 was designed better in that dept. I guess it shouldn't matter much because that is only the back of the phone. The rest of the phone looks pretty good and it feels very light in your hands. I think I remember reading somewhere that it actually weighs just a little more than the iPhone, but due to the materials and shape it gives off the impression that it's a lighter phone. The front of the phone now only uses three buttons; there is no more Search button. You now have Menu, Home and Return. The Home key now dominates the center with an enlarged Home key. Did I mention the phone is SLIM?
The phone only comes in blue or white.
Dual-core processor. 2GB RAM.
The phone is a pleasure to use, whether you're surfing the net or making a phone call. One thing that really stands out is its lightning speed! When using WiFi, everything is instantaneous! The 4G isn't as fast as WiFi, but is still significantly faster than my S2. One thing I have to get used to is the new keyboard it uses. This is because I no longer have the comma, for instance, on the main view keyboard - I have to access this by pressing the "Number" key to see punctuation along with numbers, when needed.
Another thing- the camera is lightning fast as well. I can take something like 3-4 pictures per second! Same 8 megapixel camera as the S2 and 1.9 megapixel for the front-facing one.
It has cool features that are now motion-detected. One of these is Smart Stay- this detects the motion in your eyes and it will not dim/turn off the screen because it can send it is in use. I'm sure it may not work perfectly if the lighting isn't great. Another feature is that it will automatically place a call when you are looking at someone's contact information just by swinging the phone to your ear.
I still haven't messed with everything, just been busy. I think I can also open all apps verbally - I need to look into this a little more. The phone has S-Voice, which is supposed to be kinda like Siri. I've use this a little and I think it's kinda weak; I just need to play with that some more.
Bottm line: The S3 will not disappoint if you're looking for a hard hitter.
Here is a review for those interested: http://reviews.cnet.com/samsung-galaxy-s3-review/
I will get some pics up as soon as I can.