The Certified Pile Lifter is great when you have matted commercial carpet but it's not so helpful in homes IMO. It just doesn't vacuum that well because the vacuum chamber is not sealed to the carpet. The brush must throw the debris at the vac orfice or it's not going to be removed.
We use ours a few times a year for special needs but that's about it. When you need it, though, you sure are glad you have it. Very aggressive.