I used one of these at my daughter-in-law's home and immediately ordered one for myself.
Hard wood floors - works great. Use the lowest of the three settings. Cleans easily, floor is dry within seconds. I had previously used an acrylic floor 'polish' on my hardwood floors, so the steam does dull the shine; but it would dull no matter what I use - but there are no streaks and my hardwood floor is CLEAN! And when I say it "dull the shine", that is all it does - it still shines and looks fantastic.
Ceramic tile floors - amazing how well it cleans! You can see the difference instantly. I set the steam to the 3rd setting - 'scrub' and use the scrub side of the mob bonnet. Floor is damp, but dries very quickly.
Cleaning of mop bonnets - hand washed one time, did not want to wait to use washer - machine washed all other times - cleans up well, but where I had mopped the area in front of the fireplace (ash) did not wash out completely in the machine.
I mopped every hard floor in my house the day it arrived. Even 'mopped' my leather couch LOL - on low - worked great, no damage.
Now, I want to buy the grout cleaning scrub attachment and try that.
Buy this steam mop - you will be very happy you did! Very 'green' solution to everyday living - nothing in the garbage, no pads to buy and toss, no sponges with germs and bacteria hanging around, no mops to wring out and spread dirty water around with!