It is a great gun, but once I got to compare it side-by-side with my M&P compact, there wasn't enough difference in size to justify owning one.
My Shield seems like it is only 1/2 the thickness of my M&P 9C. If you look for side by side pics on Google you will find several.
The Shield has so much going for it it's hard to hit on all of it's attributes. Size, shape, ergos, shootability, accuracy, reliability, aftermarket support, warranty, etc., etc. I upgraded mine with Warren Tactical sights and installed an Apex trigger kit. Went from being an excellent concealment piece to an AWESOME compact handgun. The stock trigger was better than any Kahr, Nano, LC9, PT709, etc. I have ever felt or fired. Adding the Apex components made a good trigger great. The ONLY downside to this gun is availability. Other than maybe
the Walther PPS the S&W Shield is a full letter grade a head of any other competing product.