Apple iPhone 4S (64GB - black, AT&T)

Pros: 1. Siri.
2. Fast.
3. Sweet multi-tasking model.
4. Fits easily in pockets.
5. Existing design fits all my iPhone 4 accessories.
6. Fast. Did I say like super fast.
7. Signal strength.
8. 64GB storage.
9. iMessage.

Cons: 1. Front and back glass makes it feel fragile.
2. Screen sweet spot is between 3.5" to 4.0". Having used 4.3" devices, they are too big. I was hoping for a 3.7" or so screen.
3. Price. The iPhone carries a premium.
4. iMessage not an option for all pla

Summary: Being the primary account holder on a family plan, I qualified for a device upgrade from the iPhone 4. I have to say that so far, it is an impressive device. Browsing has gone from quick to down right fast. Graphics and transparency effects simply fly. It is hard to overstate just how impressively fast the graphics are on the iPhone 4S. The GPU upgrade, alone, is worth the price.

Siri has been lots of fun and has already proven to be useful in interacting with the device. It is nice not to have rote memory of commands and structure and the context aware function is almost spooky.

Oh, and the camera: Wicked fast. All out, it can capture 2 fps and the quality is very high.

Data speeds: On AT&T I am getting > 6Mbs down and I am very happy with that. Ping lag is still a bit slow at 120ms and downlink seems to be at 1.2 Mbs but overall, still fast for what you use on the go.

Multi-tasking: Still the battery saving proven design of iOS 5.0. For a handheld device with limit power reserves, iOS nails multi-tasking. Background downloads, uploads, geo-location, VOIP all work perfectly so far.

Signal quality: the new antenna band feel like a different metal or something. There is a different feel. There seems to be no death grip type of signal attenuation.

On screen size: For single handed operation, the 3.5" screen is great but it would be nice to have an ever so slightly larger screen. I have used some 3.7" screens and thought those were pretty close to dead on. I have found the 4.3" screen devices to have jumped the shark and are very hard to use single handed and don't pocket well at all. For me, anything 4.0" and over is a deal breaker.