The Big Green is easy to fill and empty.  It cleans carpets with only a couple of passes and the carpets dry in 4 to 5 hours.  I enjoy using the hose and hand tool for spots, around baseboards, and hard to reach places.  The hose and cleaning supply line are easy to hook up and don't leak.  Would be nice if the hose had a power head.  Guess that is an option.  So far I have cleaned two rooms and I must say the results are impressive.  I believe there are three reasons for the success of this machine.
1.  The large rotating power brush with stiff bristles.
2.  The power of the 2X professional cleaning solution.
3.  The great suction which removes most all the water allowing the carpet to dry quickly.

Pros: Cleaning and short drying time
Cons: Unit is heavy.  Will wear you out id doing very much carpet over a couple of days.