I purchased this a couple years ago to texture the ceilings in my house after scraping the popcorn off. I will say, the product does work just fine, but not sure how it would stand up to consistent use. I will also say, if you purchase the pre-mixed containers, this will be about the most expensive way to texture you will be able to find (short of hiring someone to do the texturing for you).
The pre-mixed containers do not cover very much area, and are wickedly expensive. I'd recommend getting the 3L container and mixing your own. Purchase a container or box of topping compound and thin to the consistency somewhere between pancake batter and sour cream is the recommendation I was given and seems to work well.
Later, I purchased a real hopper gun and like it much better when doing larger areas, because the hopper lasts so much longer. After getting the hopper gun, I nearly chucked this gun because of it's cheap plastic feel until I realized that it fills the gap nicely between areas that are too large to use the aerosol cans of texture (very small patches), but too small to pull out a big hopper gun (much larger mess to clean up). A good area to use this gun on is a walk-in closet or similar sized area where it's smaller size (relative to a hopper gun) is an advantage.