There are several reviews in Youtube about it. Here's one of the better ones;
The new 3 with the larger 12.2" screen really does look good and with an i5 proc and 8GB of RAM, it should be able to do just about anything you'd want it to do. The drawbacks are it's expensive when compared to other tablets. That's why Microsoft tried to compare it to the Macbook Air rather than other tablets when they rolled it out earlier this year. Also, while the type cover is better than previous models, it's still a fairly flimsy piece of plastic that can bend on you if you type hard like I do. If all you need it for is to type a quick paper or modify some things, it's OK. I just wouldn't want to spend 8 hours a day typing on it.
Dell has some nice tablets that are less expensive than the SP3 but they don't have one with that size screen with that resolution yet.
If I hadn't dropped $800 on a new tablet last year I'd be interested in the SP3.