I like it. In fact I was about to buy one until I read some reviews. Apparently there was an issue with trigger failures on some of the early weapons. I never followed up on it, so I'm not sure what S&W ever did about the problem.
The G26 is a fine weapon, but don't plan on having it go unnoticed in your pocket. It's small-ish, but quite bulky. My wife has one, and it's a very manageable weapon with good capacity.
I usually carry a G33, which has identical exterior dimensions to the G26. The huge plus for me is that it's chambered in 357 Sig, which is hot enough for reliable penetration of sheet metal, auto glass, and some light body armor. Depending on your intended application, over-penetration may be an issue with this caliber.
As far as concealment goes, the G26, G33, and G27 are good choices, but not the best. Have you looked at Kahr Arms? They're a little pricey, but are also high quality and very thin. A thin weapon is a HUGE deal when it comes to concealed carry.