When we first moved into our new office in 2017 we were assured that the floors had been cleaned. Because we know traditional vacuums and shampooers do not really do what they claimed, we decided to let the Rainbow show what was really there. As always the dirt and filth of previous tenants was obvious in the first couple of seconds cleaning. These are just a couple of the basins of yuk we pulled out of the floors before even attempting to shampoo anything. If this is the best a regular vacuum and shampooer can do then thanks I'll pass. Thank you Rainbow for being able to be trusted at face value. the proof is in the bowl PERIOD!