After some great research and experimentation, I got myself the M&P Shield in 9mm. This pistol directly led to my interest in the 9mm and further experimentation in the line of subcompact pistols, mostly in 9mm. This officially marked the end of my '.45 ACP ONLY' lifestyle.
One issue I had when I was using the gun did not happen when I was shooting it. During a routine disassembly, well after 1,000 rounds, the recoil spring shot off the recoil guide rod that is supposed to hold it captive. I called Smith & Wesson, and immediately, they asked for my info to ship me a new one without question. Top notch customer service right there, if I do say so myself.
But with these issues aside, I still have to say that the M&P Shield is still a great piece that I find myself going to when I need a gun that I can count on. I highly recommend these pistols all the time, but I will leave you with one word of caution. SHOOT THE HECK OUT OF IT!!! Give it a thorough test of rapid fire. Pour rounds into your target as you would from the holster in a close quarters engagement. Not only is it fun, but it also can be very educational.
I would like to know what kind of experiences you have had with your Shield. Feel free to add your experiences.