Pros: Nice wide angle lens for the price, and with rebate the deal is even better. Seems to focus quickly, and is reasonably sharp from f8 up. Great for HDR shots,and Adobe Camera Raw and Lightroom 4 already have a profile for this lens to adjust for the barrel distortion.
Cons: Could be Sharper at lower f-stops. Lens cap doesn't like some polarizing filters(doesn't stay on), but no biggie. Chromatic aberration can be strong but the new lens correction tools in either Lightroom 4 or Adobe Camera Raw can eliminate that problem crazy easy. You have to have to do a little post work with this lens to make the pictures perfect.