I have the hoover floor mate and have used it religiously for 5 years. (We have 2700 square feet of hardwoods). I love it. I NEVER use it to vaccume though. If that is a selling point to you, I wouldn't use that as incentive to buy it. The floormate needs to be cleaned itself for optimal results - I use it to clean the floors and then I rinse everything dilligently. The house cleaner doesn't though, and that results in a thorough cleaning every few months because things get clogged up. It's still better than cleanign the floors yourself though for several reasons:
2. Less mess (no scrubbing then mopping up)
3. Less pain to your knees
4. WAY cleaner than a mop (not considering a steam mop)
5. The water only hits your floor once - no dirty water back on the floor again - it puts the water out, scrubs, and sucks up that water. There is no other device that does this to my knowledge.
My cousin uses a steam mop and she likes it but neither of us are fooled into believing that it actually disinfects your floor. I am not sure how the dirt gets picked up with a mop unless the head itself does it, then you wash that...
I like the Floormate and I recommend it to everyone.