[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] Sirandar:
Where I came from:

HTC Desire Z to HTC One S to Galaxy S3

What I use my phone for: (in order)

Mobile cell phone/messaging/Internet, music player, bright light photography,tethering (Phone is my only source of internet), navigation, books...

Review

Lets start with the bad since there is so little .....

1) It is a little slippery in the hand and on the table. It is so flat on its face that it will actually float off the table on the air pocket of you are not careful. => Solution: buy a case

2) It is a little power hungry and the battery life could be better ..... but Better Battery Stats can really help and most of the time it is a misbehaving app that really is the issue. => Solution; Better Battery Stats

3) The default Samsung music player and the associated file catalogger "Mediaserver" is buggy with large complex music libraries. => Solution: put a .nomedia file in your top level music directory and use the app PowerAmp instead. Huge libraries are no problem with this app.

4) Doesn't support microSD exFAT format properly on 64GB cards as of Android 4.1.1 => Solution: Use FAT32 and all works perfectly

5) The Samsung UI isn't as elegant as HTC sense => Solution: Apps from the Play Store

6) Wifi Tethering doesn't seem to allow connection as quickly as HTC phone (but it always connects)

Now for the good:

1) Call quality is excellent on Bell with no problems whatsoever so far

2) IMO the phone is exactly the right dimensions ... specifically, the phone is wide enough that I can type accurately in portrait AND the screen is big enough to see easily. The HTC One S was just too narrow to type accurately in portrait, and even hard in landscape.

3) The speakerphone is superb ..... I can converse on Skype from across the room with no difficulty.

4) The audio system has fantastic quality when paired with a good set of headphones (I use Bose MIE2s) The HTC One S was also great but the beats audio was nothing special. The audio system on this phone is every bit as good as my home system .... I would be hard pressed to tell them apart except with music with very strong bass.

5) The biggest hugest greatest thing is that it has 32GB of storage and you can put a 64GB microSD card in it = almost 100GB. You can copy your whole library in native format and never manage it again until you add new tracks = no syncing no work. There is no reason to look for any other music solution and IPods and the like are now obsolete. You need a phone so why not have a superb music player along for the ride. On-line music services offered by Apple and Google cannot even remotely compare to the speed and accessibility of having all your music on a microSD card as tracks are instantly available at all times and are fully cataloged. I will never sync again.

6) It is as smooth as butter for almost everything I do.

7) The phone is very light and has good build quality where it matters. I don't know why people complain about the back cover. When I was testing 64GB microSD cards I must have removed the cover 100x and it came off and went back on easily every time.

8) The notification light is visible from across the room

9) The Samsung UI has a lot of nice touches that actually work.(some are crap)

10) The phone seems to play well with the App TASKER.

All an all I am in awe that such a good un-crippled phone could ever make it to the market. That sums up the review === This phone is not crippled in any way I can find. Thank you Samsung

One Month Update: The S3 has really stood the test of time .... it is by far the best phone I have ever used. The audio subsystem is absolutely divine with a good set of headphones. My battery life problems disappeared when I ditched the right apps.

I can see why so many companies are trying to sue Samsung. This device handily replaces 5 very costly devices and does a way better job in my area

Device 1) Home phone, cell phone, Messenger ..... it doesn't matter what type of communication the S3 replaces them all. Skye works perfectly and the speakerphone is so good I can converse from across the room with no effort.

Device 2) Home Internet /Router: Wifi hotspot works so effortlessly I ditched my home internet ( I actually did this 2 years ago)

Device 3) A S3 with a 64GB microSD card is an unbeatable MP3 player even on its own right. When you combine this with the fact that you always have your phone with you (and thus your player too) a dedicated MP3 player is now as useful as a slide rule. Goodbye IPOD business.

Device 4) Google Maps and Traffic: Yes occasionally Google takes you on a wild goose chase, but really nothing can touch it IMO, especially when combined with the Traffic overlay.

Device 5) Book reader ...... The S3 isn't big enough to be the perfect book reader but it is adequate and always with you.