I went out with the idea that I would not like this Sig... It seemed too bulky with too short a grip and too heavy.
However, it won me over on the range. The additional size of the slide (giving the top heavy appearance) makes the gun quite easy to run and manipulate. The full size controls are easy to use. The full size sights are excellent. The additional weight makes the gun a real pussy cat to shoot.
The mechanical accuracy is very good. Shooting at 25 yards, I could easily keep all shots within the A-zone of a standard IPSC target.
The biggest drawback on this gun is the trigger, which is heavy, stacks a lot, and has a lot of over-travel. This gun is crying desperately for a good trigger job and an over-travel stop.
The weight is an issue, but not a total deal breaker for me. Its not any heavier than a steel j-frame, which I can pocket carry in casual pants. It would work well in a belt holster.
The gun will be much more versatile later this year when the 8-round magazine with X-grip extension is available.
In short, I like the gun. I wish the trigger was better. Will it replace my R-9...No. It's a little bit different gun to me.
Check out the cover story of next month's Shooting Illustrated for all of my thoughts!