Tried one in the kitchen and was not impressed, lot's of steam, condensation everywhere, pools of water and did not shift the grease any better than a spray and wet cloth.
I bought one for my wife who didn't want it so it ended up in the garage. Useless at shifting gunge off engines, axles, gearboxes etc.
I think sometimes buying a cheap version of something can make you think they are all a waste of time.
We have a Karcher one that is similar size to a cylinder vacuum. It's brilliant and we wouldn't be without it. We have quarry tiles in a biggish area and we use it instead of mopping. It has head designed for that, we put a microfibre towel on it. The floor comes up cleaner than it ever did when mopping and it's dry in minutes.Microfibres go straight in the washing machine and you are done. Our one can be filled on the fly too. Brilliant around the toilet etc but with 2 youngish boys the steam rising can stink a not if you don't do it often.Ours has paid for itself in time and chemicals easily.