I've had one of these in my cab for almost 3 years now, and I have had no problems at all with it. The one I have is definitely not adjustable.
Also, just like mentioned here, I use an extension cord to connect this to the wall, have the computer connected to the 'control' port, and a regular power strip plugged into the 'switched' outlet. The monitor, marquee lights, speaker amp etc are plugged into the standard power strip.
And yeah, the guys at sears will probably have no idea where to find this. Mine was by the circular saws on an end cap of an isle when I found it.
Koz