Mika's holster are truly remarkable. I marvel every time I see one in use. They are very affordable, last a long time and work as advertised...
I got his tactical pocket mirror and use it when I need to keep an eye on what's behind my back (ie. sitting in a restaurants, etc.) His protective holster/cover is nice, too.
Another place that always giving me the creep is standing over the public restroom's urinal. I am always paranoid of what's going on behind me. Haven't found a good solution to that problem, yet!