The preening power foam, works reasonably well " but if your not careful " it can get real messy real quick and getting it on anything else but clothing is dangerously slippery

I could always tell the use of this type of product when I cleaned carpets professionally. In my opinion It leaves residial foam in the carpet. This in turn cleans your feet/shoes leaving the dirt in the carpet. Often my customers would tell me the carpet got dirtier within a week or two than it was before use of this type of product.
I think it should only be used as a temporary measure and a proper clean done with a hot water extraction cleaner (steam clean) by either a hire system or a professional. Please note I am no longer in the industry I am passing this on as informative only.

I have stained carpet at my front door. I have a property inspection in a few days, and my property manager is a real tyrant! So I bought some Vanish preen power foam. I followed the instructions to the ''t,'' it did absolutely nothing! Made no difference whatsoever, don't buy this product, it is a waste of money!

This carpet cleaning spray was an absolute waste of time, energy and money. The very dirty carpet I used it on did not get cleaner than from vacuuming alone (with a top of the market vacuum cleaner). But it did leave the carpet feeling sticky. Took a day to dry on a low pile carpet. Area was vacuumed repeatedly and still no extra dirt was removed. If you have a very dirty carpet do yourself a favour and DONT even try to clean it with this spray foam...!

I have been an avid fan of the Preen Carpet powder, to clean large areas, but after receiving a Carpet Shampooer as a gift, this has now become my preferred cleaning option.
Of course small spills and dirty marks still occur, on a regular basis, and I often use Vanish Preen Powerfoam to clean these areas.
It works well, has a pleasant smell, and is reasonably priced.
Overall a good product