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DJ - test it easily yourself by laying it on a glass surface and turning the laser on. Draw a line on a piece of paper and aim the laser at that line. Roll the device along the table and see it it maintains the same dot height relative to the line or not.
Also, mount the laser in your focuser and nip the clamp up lightly so you can rotate the laser. If you rotate it, does the beam move relative to the primary's dot?
Although these are meant to be non-adjustable in day to day circumstances, a decent enough hit will knock it out of whack like any other. It isn't impervious to de-collimation, just more resistant than most.
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