I bought the Shark Steam Mop off QVC online last month, if they still have any left it comes with extra pads and you have the option of paying it out over 5 months on your credit or debit card at no charge. Plus it was cheaper than in the store, shipping was the same as sales tax. Sweet!
It works "ok". It doesnt wipe away stuff as easily as on the commerical, what does. But I love that there is no nasty bucket of water and old dirty mop. That the steam is so much more sanitary than that and I can throw the pad in the wash. That is such a plus that I dont care if it needs the extra run overs to get stuff up.
I have the bissell floor sweeper. I had the shark too, actually two of them because one went out. Our bissell sweeper (bought at Target, not sure if there are different models sold at different places) has outlasted my Sharks over time and works just as well as they did, if not better. After awhile the Sharks just started to "putter" and not work as well, even with cleanings. My bissell is still going strong after year two!
Good Luck!