Like anything, takes a bit of getting used to, I had just got the hang of mine and got it operating to my satisfaction when I had to let it go, as I had ordered an RX20 and needed the pennies. Wish I had kept it though, the Yorkshire gentleman who now owns it, loves it and I believe he uses it on most carpet jobs. You need a powerful vacuum system, and need to set the pressure at no more than 100psi to ensure a speedy drying times.
Dave.