I have a bissell one. We borrowed the in-laws monster bissell one years ago when we were in the old house, and it was brilliant so went out and got me a smaller version which is the Quickwash one. No good for upholstery etc just for carpets or a wooden floor cleaner (never really understood that myself..whats wrong with using a mop on the wooden floor??
) Anyhoo, we've moved into a house that is wooden floor in every room
So if you want cheap and cheerful and just for carpets i'd recommend that one. Vax do a similar one too which is good.
If you've got a TJ huges near you have a look in there cos there always doing them half price