I clean my own sensors, but avoid wet cleaning whenever possible.
The reviews of the product look fake to me, particularly the one who claims the swab came out black.
I also take issue with those who say one swipe of the swab is all it takes. I find that 5 swabs is the usual number for a wet cleaning. The cleanliness of your work area, the swabs, and the solution are critical. Never use a swab twice. I ignored the advice the first time I tried (good swabs are expensive), and smeared dust over the whole surface.
The other thing to be concerned about is excessive cleaning solution, A very tiny amount is all you should use. If there is excess, it can run under the AA filter and its good bye sensor.